In a poem the words anapest and iambs are used to describe?

In a poem, the words "anapest" and "iamb" are used to describe the rhythm or meter.

Here's a breakdown:

* Iamb: An iamb is a metrical foot consisting of an unstressed syllable followed by a stressed syllable. Think of the word "again" (a-GAIN).

* Anapest: An anapest is a metrical foot consisting of two unstressed syllables followed by a stressed syllable. Think of the word "understand" (un-der-STAND).

Poets use these metrical feet to create a specific rhythm and flow in their poems.

For example, a poem written in iambic pentameter (five iambs per line) will have a more regular and flowing rhythm, as seen in Shakespeare's sonnets. A poem written in anapestic tetrameter (four anapestic feet per line) will have a more galloping and lively rhythm.