役に立たない やくにたたない Also written 役にたたない, やくに立たない, 役に立た無い Meanings Expression, い-adjective of no avail; useless See also: 役に立つ (やくにたつ). Kanji 役 role. Read as ヤク. 立 stand. Read as たつ. Jinuma: Japanese Dictionary · Word lists