階かい段だん昇しょう降こう機き

noun

stairlift; chair lift for stairs

A mechanical device installed along a staircase to carry a person seated in a chair up and down the stairs, typically used in homes for elderly or disabled individuals.

• 祖そ母ぼが足あしを悪わるくしたので、家いえの階かい段だんに階かい段だん昇しょう降こう機きを設せっ置ちした。

  Because my grandmother hurt her leg, we installed a stairlift on the stairs at home.