The burden of a song; a phrase or verse which recurs at the end of each of the separate stanzas or divisions of a poetic composition.

a phrase or line, generally about the central topic, which is repeated, usually at regular intervals throughout a poem

a chorus ( melody and text) that is repeated at intervals in a song, especially following each verse

the part of a song where a soloist is joined by a group of singers

To abstain from.

To keep one's self from action or interference; to hold aloof; to forbear; to abstain.

not do something; "He refrained from hitting him back"; "she could not forbear weeping"