一甲子 yìjiǎzǐ sixty years Origin Definitions Defs Strokes Stroke Words Sentences Sents 一 yī numeral one one; the number 1; single; alone甲子 jiǎzǐ sexagenary cycle A cycle of sixty years (or sixty days) formed by combining the ten 天干 tiāngān and twelve 地支 dìzhī