stepladder
n. 活梯
A stepladder is a portable ladder that is made of two sloping parts that are hinged together at the top so that it will stand up on its own.
1. a folding portable ladder hinged at the top
A tall stepladder stood in front of an opening which the grille had covered.
在原來鐵柵欄蓋著的那個洞口前面,放著一個高梯凳.
Tell him to back down carefully. The stepladder is not steady.
告訴他小心下來, 活梯不穩.