プログレッシブ和英中辞典(第4版)の解説
しきい【敷居】
❶a wooden groove at the boundary of rooms in which sliding doors move
窓の敷居
a windowsill
❷〔入口〕the threshold
敷居をまたぐ
cross [pass] the threshold
二度と我が家の敷居をまたぐことはあるまいと思いながら戦地に赴いた
I went to the front doubting that I would come home alive.
二度とうちの敷居をまたぐな
Don't you ever set foot in my house again!
敷居が高い
あまりご無沙汰したのでお宅の敷居が高くなりました
I haven't visited you for so long that I feel self-conscious about coming.
あの人の家は敷居が高くて行きにくい
I feel hesitant to visit him.