refocus vs concentre

refocus and concentre both are verbs.

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

As verbs, concentre is a hypernym of refocus; that is, concentre is a word with a broader meaning than refocus:

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

Other hypernyms of refocus include concenter, focalise, focalize, focus.

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