Tashṭīr is a poetic arrangement in which each hemistich of a couplet is divided into two units, with the resulting endings arranged in a systematic sound pattern. It creates internal pauses and rhyme-like echoes.
The important feature is not merely cutting a hemistich into two textual pieces: audible correspondence must link the relevant ends, while the poetic meter is preserved.
To identify tashṭīr, analyze the internal endings of both halves; the couplet’s final rhyme alone is insufficient.