・the top stair but one 上から二番目の段.

・He tripped on the top stair. 最上段で踏みはずした.

3 [pl.] ＝landing stage.

abve stirs (特に, もと召使部屋に対して家族の住む)階上で[へ] (cf. abovestairs). 《1667》

belw stirs

(1) (特に, もと召使の住んだ)地下室で[へ]; 召使部屋で[へ], 台所で[へ] (cf. belowstairs).

(2) ＝down STAIRs. 《1598-99》

dwn stirs 階下で[へ] (cf. downstairs).

・go down stairs 階下へ行く.

p stirs 階上で[へ] (cf. upstairs).

・go up stairs 階上へ行く.

OE ster ＜ Gmc stair (Du. ＆ LG steiger landing stage) ← stai-, st- to climb (cf. sty^２) ← IE steigh- to go up (Gk steikhen) Stair /st ｜ st^（ｒ/, 1st Viscount