入道雲 にゅうどうぐも Meanings Noun cumulonimbus; gigantic columns of clouds (in summer); thunderhead See also: 積乱雲 (せきらんうん). Kanji 入 enter. Read as ニュウ. 道 road. Read as ドウ. 雲 cloud. Read as くも. Jinuma: Japanese Dictionary · Word lists