出典:Wiktionary
From Middle English noteful, notful (“useful”), from note (“use, need”), from 古期英語 notu (“use, enjoyment”), from Proto-West Germanic *notu, from Proto-Germanic *nutō, *nutjō, *nutą (“use, enjoyment”), from Proto-Indo-European *newd- (“to acquire, make use of”) + -ful. Equivalent to note + -ful. Related to 古期英語 nēotan (“to use, enjoy”), 古期英語 nyttian (“to make use of, utilize”), 古期英語 nytlīċ (“useful, profitable, beneficial”).
noteful (comparative more noteful, superlative most noteful)