intonate

First attested in 1795; borrowed from Medieval Latin intonātus, perfect passive participle of intonō (“to vocalize, chant”) (see -ate (verb-forming suffix)), from in- (inchoative prefix) +‎ tonus (“pitch, tone”) +‎ -ō (verb-forming suffix); doublet of intone. Cognate with French entonner, Italian intonare.

First attested in 1631; borrowed from Latin intonātus, perfect passive participle of intonō (“to thunder forth”), see -ate (verb-forming suffix).