Where does “amuser” come from?

amuser (Norman) comes from Old French amuser, from Old French a-, from Latin ad-, from Proto-Italic *ad- — ad.

Definitions

Ancestry of “amuser”, step by step

StepLanguageWordMeaning
1Old Frenchamuserto stupefy, waste time, be lost in thought
2Old Frencha-indicating movement towards something;...
3Latinad-to; usually prefixed to verbs, in which cases it...
4Proto-Italic*ad-ad
Every word from Proto-Italic *ad- →Every word from Latin ad- →Every word from Old French a- →
amuser — Etymology, Origin & Word History | Etymology Explorer