確固不動 かっこふどう Also written 確乎不動 Meanings の-adjective, Noun unshakeable (e.g. belief); invincible; steadfastness; firmness; unwavering (e.g. support); absolutely secure Kanji 確 certain. Read as カク. 固 solid 不 un- 動 move. Read as ドウ. Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists