companionway

(nautical) a staircase or ladder from one deck to another on a ship

Japanese Meaning

船のデッキ間を繋ぐ階段や梯子（船内の上下通路）

She descended the narrow companionway to reach the lower deck where the crew was preparing dinner.

彼女は狭い船内の階段を下り、乗組員が夕食の準備をしている下甲板に着いた。

Sense（1）

(nautical) a staircase or ladder from one deck to another on a ship

companionways

（ plural ）