accentuation (n.)

1690s, from Medieval Latin accentuationem (nominative accentuatio) "intoning, chanting," noun of action from past-participle stem of accentuare "to accent," from Latin accentus "song added to speech," from ad "to" (see ad-) + cantus "a singing," past participle of canere "to sing" (from PIE root *kan- "to sing").