Tmesis is the deliberate separation of a single word or established phrase by placing material inside it, as in “abso-bloody-lutely” or “what-so-ever.” The inserted element interrupts normal form and makes the language sound emphatic, playful, agitated, or colloquial. In poetry, tmesis can alter rhythm, mimic spontaneous speech, and draw attention to a word’s components. It may also challenge formal diction by introducing a disruptive voice into a familiar expression. Because the break is conspicuous, it can embody emotional interruption, urgency, or a refusal to speak smoothly and conventionally.

Tmesis interrupts a normally unbroken word or fixed expression, as in “abso-bloody-lutely” or “un-freaking-believable.” In poetry, the insertion can alter meter, mimic a speaker’s intensity, or make familiar language newly noticeable. The break should feel motivated by voice and rhythm rather than arbitrary. Related techniques include parenthesis and hyperbaton, but tmesis specifically splits a single lexical unit or established phrase.