Middle English word accidently comes from Middle English -ly (-ly (suffix used to form adverbs).), Middle English accident

Detailed word origin of accidently

Dictionary entry	Language	Definition
-ly	Middle English (enm)	-ly (suffix used to form adverbs).
accident	Middle English (enm)
accidently	Middle English (enm)	By chance, by accident. Not naturally, artificially. Temporarily.

Words with the same origin as accidently