hold back vs confine

hold back and confine both are verbs.

Word	Noun	Adjective	Verb	Adverb
hold back	No	No	Yes	No
confine	No	No	Yes	No

As verbs, confine is a hyponym of hold back; that is, confine is a word with a more specific, narrower meaning than hold back:

hold back (verb)	confine (verb)
prevent the action or expression of	place limits on (extent or amount or access)
hold back, as of a danger or an enemy; check the expansion or influence of	to close within bounds, or otherwise limit or deprive of free movement
hold back; keep from being perceived by others	prevent from leaving or from being removed
secure and keep for possible future use or application	deprive of freedom; take into confinement
wait before acting	close in
refrain from doing