大弟 dàdì eldest younger brother Origin Definitions Defs Strokes Stroke Words Sentences Sents dàdì eldest younger brother 大 dà adjective eldest the oldest; first in order of seniority among siblings or relatives弟 dì noun younger brother (bound form) younger brother; a junior male relative of the same generation; a junior male frienddàdì little brother 大 dà adjective big big; large; great; vast; high in scale or intensity; (of a person) old; adult弟 dì noun younger brother (bound form) younger brother; a junior male relative of the same generation; a junior male friend