一進一退 いっしんいったい Meanings Noun, する verb, Intransitive, の-adjective now advancing and now retreating; ebb and flow; seesawing; taking alternately favorable and unfavorable turns Kanji 一 one. Read as イチ. 進 advance. Read as シン. 退 withdraw. Read as タイ. Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists