歳さい代だいMeaningsSuffix1. decade (of age); -ties (e.g. sixties)Kanji used歳years old代substitutePitch accentさいだいComposed of歳さい... years old; age (of) ...Counter代だいcharge; cost; price; generation; age; (school) year; cohort; reign; era; a representative of; …NounExamples1祖そ父ふは９０歳さい代だいである。My grandfather is in his nineties.