cuarenta
/kwaˈɾenta/ · B1 · num
forty
Sounds like quarantine, which comes from Italian quaranta giorni: forty days
Venetian ports made ships wait forty days (quaranta giorni) before landing, and that's where English got quarantine. Spanish cuarenta comes from the same Latin quadraginta. Its root cuatr- (four, as in cuatro) is there too: cuarenta is four tens.