A bannister is the rail you hold as you walk up or down the stairs — the same thing as a banister. The extra n is only another spelling. Both are used in English, and neither is a mistake.

A bannister is the rail you hold as you walk up or down the stairs bannister指的是你上下樓梯時扶的那根扶手 the same thing as a banister跟banister是同一個東西 The extra n is only another spelling多出來的那個n只是另一種拼法 Both are used in English兩種寫法英文裡都有人用 and neither is a mistake而且都不算錯

In a house it is that long handrail beside the steps; you reach for it when the stairs are steep or when your hands are full.

In a house在房子裡 it is that long handrail beside the steps它就是樓梯旁邊那根長長的扶手 you reach for it when the stairs are steep or when your hands are full當樓梯很陡，或你雙手都拿滿東西時，你會伸手去扶它

Though actually, people are a little loose with it. Many families say “bannister” for the whole side of the staircase, the rail and the upright posts together. Careful speakers keep bannister / banister for the part you hold, and call those short posts balusters. Most people never bother with that difference, and you will be understood either way.

Though actually不過事實上 people are a little loose with it大家對這個字用得有點鬆散 Many families say 'bannister' for the whole side of the staircase很多家庭會用'bannister'來指整個樓梯的那一側 the rail and the upright posts together也就是扶手加上那些直立的柱子 Careful speakers keep bannister / banister for the part you hold講究的人會把bannister／banister留給你扶的那個部分 and call those short posts balusters而把那些短柱子叫做balusters（欄杆柱） Most people never bother with that difference大多數人根本不在意這個差別 and you will be understood either way不管用哪個大家都聽得懂

With a capital B, Bannister is also an English family name. That name comes from an old word for a basket, and it is not related to the stair rail. If someone talks about Roger Bannister, they mean a famous runner, not furniture.

With a capital B大寫B開頭時 Bannister is also an English family nameBannister也是一個英國姓氏 That name comes from an old word for a basket這個姓氏來自一個指籃子的古字 and it is not related to the stair rail跟樓梯扶手沒有關係 If someone talks about Roger Bannister如果有人講到Roger Bannister they mean a famous runner, not furniture他們指的是一位有名的跑者，不是家具