forcené

crazed, frenzied, deranged

From forcener (“to go mad, become enraged”), from Middle French, from Old French forsener (“to be mad with rage”) (compare Old French forsenede (“one who has lost his mind”)), from for- + sen (“sense, reason, mind”), from Frankish *sinn (“sense, mind, judgement”). Cognate with German Sinn (“sense, meaning, mind”), Dutch zin (“sense, desire”). Related to asséner.

maniac

“travailler comme un forcené” — to work like a maniac

From forcener (“to go mad, become enraged”), from Middle French, from Old French forsener (“to be mad with rage”) (compare Old French forsenede (“one who has lost his mind”)), from for- + sen (“sense, reason, mind”), from Frankish *sinn (“sense, mind, judgement”). Cognate with German Sinn (“sense, meaning, mind”), Dutch zin (“sense, desire”). Related to asséner.