gear/ gɪər /

1.noun [c] [术语] [of machine] 
齿轮

2.noun [of car] [ bicycle] 
排挡

3.noun [u] 
(equipment) 装备

4.noun [u] 
(clothing) 服装

5.vt.
to be geared to {or} towards 使适应

to be in first/second {etc} gear
第一/二{等}挡
to leave the car in gear
摘挡停车
to change {or} > shift gear
 [US] 换挡