divide vs unpick

divide is a noun but unpick is not a noun.

Word	Noun	Adjective	Verb	Adverb
divide	Yes	No	Yes	No
unpick	No	No	Yes	No

divide (noun)	unpick (noun)
a ridge of land that separates two adjacent river systems
a serious disagreement between two groups of people (typically producing tension or hostility)

divide (verb)	unpick (verb)
perform a division	become or cause to become undone by separating the fibers or threads of
move or break apart	undo (the stitches) of (a piece of sewing)
force, take, or pull apart
make a division or separation
separate into parts or portions
act as a barrier between; stand between