緩急自在 かんきゅうじざい Meanings Noun, な-adjective varying the tempo or speed (of something) at will Kanji 緩 loose. Read as カン. 急 sudden. Read as キュウ. 自 self 在 exist. Read as ザイ. Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists