IPA: /əˈtoʊnəli/
KK: /əˈtoʊnəli/
In a way that does not follow traditional musical tones or keys, often used in music that lacks a clear tonal center.
The composer wrote the piece atonally, creating a unique and dissonant sound.
Atonally → It is formed from "a-" (meaning without) and "tonal" (from Latin "tonalis", meaning relating to tone). The word "atonally" means in a manner that lacks a tonal center or key, thus without a specific tone.
Think of 'without' ('a-') a 'tone' — that's why atonally means lacking a specific tone.