1834, "hobby, pet project" (adjective faddy is from 1824), of uncertain origin. Perhaps shortened from fiddle-faddle. Or perhaps from French fadaise "trifle, nonsense," which is ultimately from Latin fatuus "stupid." From 1881 as "fashion, craze," or as Century Dictionary has it, "trivial fancy adopted and pursued for a time with irrational zeal."
例文
1. Hamnett does not believe environmental concern is a passing fad .
ハムネットは環境への関心は一過性の気まぐれではないと考えている。
2.The question can 't be lightly dismissed as a fad or a dream.
この問題は変な考えや空想であって考慮しないと軽率に考えてはならない。
3.His interest in photography is only a passing fad .
彼の撮影への興味は一時的な趣味にすぎない。
4.Collecting stamps is a good fad .
切手収集は良い余暇の楽しみです。
5. One is the flavin adenine dinucleotide ( FAD ), and the second is methenyltetrahydropteroylployglutamate ( MTHF ).