不確定性原理 ふかくていせいげんり Meanings Noun uncertainty principle Kanji 不 un-. Read as フ. 確 certain. Read as カク. 定 fix. Read as テイ. 性 nature. Read as セイ. 原 original. Read as ゲン. 理 reason. Read as リ. Word lists Physics Jinuma: Japanese Dictionary · Word lists