階下 かいか Meanings Noun lower floor; downstairs Antonym: 階上 (かいじょう). bottom of the stairs; foot of the stairs Antonym: 階上 (かいじょう). Kanji 階 floor. Read as カイ. 下 down. Read as カ. Example sentences 階下へおりてらっしゃい。Please come downstairs. ディナーを食べに階下に行こう。Let's go downstairs for dinner. アンは階下に降りてきた。Ann came downstairs. 私たち、パパにインターホンで階下にすぐこれるかどうか尋ねたのよ。We asked him on the interphone if he could come downstairs quickly. 辞書を階下に忘れてきた。I left my dictionary downstairs. Jinuma: Japanese Dictionary · Word lists