階かい下か

noun

lower floor; downstairs

Refers to the floor below the current one, or the downstairs area of a building. Antonym: 階上 (upstairs).

Antonyms: 階上

• 階かい下かから物もの音おとが聞きこえた。

  I heard a noise from downstairs.

• この建たて物ものの階かい下かは店てん舗ぽになっている。

  The lower floor of this building is used as a shop.

noun

bottom of the stairs; foot of the stairs

Specifically the area at the base of a staircase. Antonym: 階上 (top of the stairs).

Antonyms: 階上 (かいじょう)

• 彼かれは階かい下かで靴くつを脱ぬいだ。

  He took off his shoes at the foot of the stairs.