concentre vs refocus

concentre and refocus both are verbs.

Word	Noun	Adjective	Verb	Adverb
concentre	No	No	Yes	No
refocus	No	No	Yes	No

As verbs, refocus is a hyponym of concentre; that is, refocus is a word with a more specific, narrower meaning than concentre:

concentre: bring into focus or alignment; to converge or cause to converge; of ideas or emotions
refocus: focus anew

concentre (verb)	refocus (verb)
bring into focus or alignment; to converge or cause to converge; of ideas or emotions	put again into focus or focus more sharply
	focus anew
	focus once again