A small horse; a pony.

An old, useless horse.

(obsolete, derogatory) A paramour.

Someone or something that nags.

A repeated complaint or reminder.

A persistent, bothersome thought or worry.

Misspelling of knack.

(transitive, intransitive) To repeatedly remind or complain to (someone) in an annoying way, often about insignificant or unnecessary matters.

To bother with persistent thoughts or memories.

To bother or disturb persistently in any way.