The story
- Medieval Latin · derived fromintonō
- Old French · derived fromentoner
- Middle English · inherited fromentune
- English todayintone
From Middle English entune, entone, from Old French entoner, from Medieval Latin intonō, from in- (inchoative prefix) + tonus (“pitch, tone”) + -ō (verb-forming suffix); doublet of intonate. Cognate with French entonner, Italian intonare.
Etymology from Wiktionary, CC BY-SA 4.0.