IPA: /ˈoʊ.vəˌtoʊn/
KK: /ˈoʊvərˌtoʊn/
A hint or suggestion of something that is not directly stated, often implying a deeper meaning or quality. In music, it refers to a higher tone that occurs along with the main tone.
The speech had an overtone of sarcasm that many people noticed.
Overtone → It is formed from "over-" (meaning above or beyond) and "tone" (from Old English "tōn", meaning sound or tone). The word "overtone" refers to a sound that is above the fundamental tone, adding richness to the sound.
Think of a sound that is 'above' ('over-') the main sound ('tone') — that's what an overtone is, a richer layer of sound.