IPA: /ˈæsɪdli/
KK: /ˈæsɪdli/
In a way that is sour or sharp in taste, or with a tone that shows bitterness or sarcasm.
She responded acidly to the criticism, making it clear she was not pleased.
Acidly is formed from "acid" (from Latin "acidus", meaning sour) and "-ly" (a suffix used to form adverbs). The word describes the manner of being sour or sharp in tone or manner.
Think of something that is 'sour' ('acid') and how it can describe a sharp way of speaking when you add '-ly' to show it’s in a manner.