百年偕老 bǎiniánxiélǎo to have a long happy marriage Origin Definitions Defs Strokes Stroke Words Sentences Sents 百年 bǎinián lifetime a person's whole life; for one's entire lifetime偕老 xiélǎo to grow old together (literary) for a husband and wife to live together for a lifetime until old age; often used in the idiom 白头偕老 báitóuxiélǎo