敷居
Common
Noun
1
noun (common) (futsuumeishi)
umbral
1
noun (common) (futsuumeishi)
architecture
threshold (esp. one with grooves for sliding doors);sill
See also:
鴨居 (かもい)
もう二度とこの家の敷居はまたがない。
I'll never set foot in this house again.
Other forms
閾 【しきい】