Where does “aide-mémoire” come from?

aide-mémoire (English) comes from French aide-mémoire, from French aider, from Middle French ayder, from Old French aidier, from Latin adiūtō, from Latin -tō, from Latin -tus, from Proto-Italic -tus — Derives action nouns from verb roots.

aide-mémoire (English): A memory-aid; a reminder or memorandum,...

Definitions

  1. A memory-aid; a reminder or memorandum,...

Ancestry of “aide-mémoire”, step by step

StepLanguageWordMeaning
1Frenchaide-mémoireaide-mémoire, crib
2Frenchaiderto help; to aid
3Middle Frenchayderto help; to aid
4Old Frenchaidierto help
5Latinadiūtōto help, serve, assist
6Latin-tōForms here
7Latin-tusForms the past participle of verbs; Forms...
8Proto-Italic-tus
9Proto-Indo-European-tusDerives action nouns from verb roots
Every word from Proto-Indo-European -tusEvery word from Latin -tusEvery word from Latin -tō