Arabic poetry metres: a learner’s guide to ‘arud

Updated 26 September 2026 · 6 min read

Classical Arabic verse is not free-form decoration. For more than a thousand years, poets worked inside a measured system called ‘arud (عروض), the science of poetic metre. If you can hear a metre, you can follow a qasida, recitation, or sung line with far more pleasure. This article sets out the system in plain terms: who described it, how a line is built, which metres you will meet most often, and how modern “free verse” still talks to the old feet.

Al-Khalil and the science of ‘arud

The standard account credits al-Khalil ibn Ahmad al-Farahidi of Basra, working in the eighth century CE, with organising Arabic metre into a coherent theory. He was already famous as a lexicographer; the metrical work sits beside that labour of listening. Later grammarians and commentators, especially al-Akhfash, refined the scheme. Tradition usually speaks of fifteen metres in al-Khalil’s circle, with a sixteenth, al-mutadarak (المتدارك), added afterwards. Exact lists and names vary slightly in the medieval handbooks; what matters for a learner is that the metres were not invented as school exercises. They were patterns already audible in pre-Islamic and early Islamic verse, then named, scanned, and taught.

Scanning is done with taf‘ilat (تفعيلات), mnemonic “feet” such as fa‘ulun and mustaf‘ilun. Each foot is a short string of consonants with a fixed pattern of long and short syllables. Arabic metre is quantitative: it cares about syllable length, not English-style stress. A short syllable is typically a consonant plus a short vowel; a long syllable is a long vowel, a diphthong, or a vowel closed by a following consonant. Reciters feel this as a pulse. You do not need full theoretical fluency to start; you need to hear “short–long” against “long–long” as you read aloud.

Every metre admits zihaf and ‘illa — licensed shortenings — so a line in al-tawil will not always match the textbook foot for foot. Printed scansions are idealisations; the ear still recognises the family of the metre.

The bayt: two hemistichs

The basic unit of classical verse is the bayt (بيت), the “house” or couplet-line. A bayt has two hemistichs. The first is the sadr (صدر), the “chest” or opening half; the second is the ‘ajuz (عجز), the “hindquarters” or closing half. In manuscripts and careful editions they are often printed on one line with a visual break, or on two short lines that still count as one bayt.

Rhyme (qafiya, قافية) normally falls at the end of the ‘ajuz. In a classical qasida the same rhyme letter, the rawi (روي), returns in every bayt. The first bayt may also rhyme internally at the end of the sadr; that opening flourish is called tasri‘. After that, you wait for the end of each full line. This is why a long ode can feel both strict and spacious: the metre ticks in both halves, but the rhyme lands once per bayt, like a door closing.

When you listen, train your ear on that door. The sadr often leans forward; the ‘ajuz settles. Singers still respect this architecture even when they stretch a vowel for tarab.

The sixteen metres, and the ones you will actually meet

Medieval lists of the sixteen buhur (بحور, “seas”) usually include al-tawil, al-madid, al-basit, al-wafir, al-kamil, al-hazaj, al-rajaz, al-ramal, al-sari‘, al-munsarih, al-khafif, al-mudari‘, al-muqtadab, al-mujtathth, al-mutaqarib, and al-mutadarak. Several of these are rare in the famous anthologies. A learner who can recognise eight common metres will already hear most of the poetry people still recite and sing.

The table below gives a typical hemistich pattern for those eight. Treat the feet as a starting map, not a police code. Poets trim and vary them; that is part of the craft.

Al-tawil (“the long”) is the great narrative and gnomic metre of the pre-Islamic qasida. Many of the mu‘allaqat move in it. It feels walking and ample: a short–long pair, then a longer foot, then the same again. Al-basit (“the outspread”) is another early favourite, with a more marching, open gait. Al-kamil (“the complete”) and al-wafir (“the abundant”) are densely used in the Abbasid period; both can sound urgent or full-chested, which is why panegyric and invective like them. Al-rajaz is the workhorse of teaching verse, battle cries, and later light or didactic poetry; its repeating mustaf‘ilun is easy to chant. Al-khafif (“the light”) often feels song-like and was much used in later lyric. Al-mutaqarib (“the closely spaced”) trots on repeated fa‘ulun; epics and some modern recitations favour it. Al-ramal (“the sand-trot”) is close to many sung metres and to the later strophic tradition.

If you remember only three families, remember tawil and basit for the old ode, kamil and wafir for the Abbasid line, and ramal, khafif, and rajaz for verse that wants shorter breaths.

How to hear a metre

Do not begin with a chart. Begin with one vowelled bayt in a known metre, read it aloud twice at speaking speed, then tap a finger only on the long syllables. Ignore meaning for a minute. You are listening for a repeating cell. Next, hum the line on a single pitch, as singers do when they first fit words to a maqam. Humming strips away grammar and leaves quantity.

A practical habit: mark the hemistich break with a pencil slash. Many learners collapse sadr and ‘ajuz into one English-style line and then wonder why the rhyme feels late. It is late on purpose. Another habit: when a word looks as if it should break the metre, check wasl (liaison) and the poetic licences that drop a hamza or shorten a vowel. Classical poets expected the line to be heard, not merely decoded from unvowelled script.

Recordings help, but choose reciters who keep a speaking pulse rather than a purely musical rubato if your goal is scansion. Once the pulse is in your ear, a sung qasida becomes easier, not harder: you will notice where the composer sits on the metre and where he floats above it.

Free verse and shi‘r al-taf‘ila

In the mid-twentieth century, poets in Iraq and elsewhere developed shi‘r al-taf‘ila (شعر التفعيلة), verse built from the old feet without the fixed length of the bayt and without monorhyme. Badr Shakir al-Sayyab and Nazik al-Mala’ika are the names most often attached to the early experiments, usually dated to the late 1940s. The line may contain two feet or seven; the poem may change its breath from stanza to stanza. This is “free” relative to the qasida, not free of metre altogether. English “free verse” is a loose translation and can mislead.

A parallel current, sometimes called qasidat al-nathr or prose poem, steps further from ‘arud. Debates about which of these is still “poetry” are old and heated; you do not need to join them to read. What helps is to notice the contract each poem offers. If you can still tap fa‘ilātun, you are in taf‘ila country. If the music is only syntactic and imagistic, you are elsewhere. Both inherit diction, motifs, and even hemistich habits from the classical sea.

You do not abandon ‘arud when you read modern verse. You reuse it as a listening skill: the same ear that catches al-tawil in a mu‘allaqa will catch a broken ramal in a later poem, and will hear those feet when a qasida becomes a song.

Next steps

Once the bayt and a handful of metres feel familiar, read how the classical qasida uses one metre and one rhyme from nasib to praise. Then look at Andalusian strophic forms, which play a different game with refrain and kharja. A short list of major poets will show the metres in living careers, and a practical reading method will show you how to vowel, recite, and listen without getting lost in i‘rab.

Related articles

• How a classical qasida is built
• Muwashshah and zajal: Andalusian strophic song
• How poems become songs: the sung qasida

Dates, attributions and terminology vary between sources and schools. Treat this article as a learner’s introduction and check scholarly editions for anything important.