cap / hat / collar / scarf / sleeve / belt /  …………

slave / leave / sleeve / sneeze
奴隶（slave）离开(leave)时用袖子(sleeve)捂住喷嚏(sneeze)。

shaft sleeve 轴套
short-sleeved shirt 短袖衬衫
an ace up your sleeve 锦囊妙计
roll up your sleeves 撸起袖子 准备动手干
wear your heart on your sleeve 感情外露
keep/have sth up one’ sleeve 胸中自有主张 胸有成竹
long sleeve 长袖
cylinder sleeve 汽缸套
short sleeve 短袖
protective sleeve 保护套
rubber sleeve 胶皮套
sleeve bearing 滑动轴承
bishop sleeve 主教袖
have sth. up one's sleeve 有秘密
roll up one's sleeves 卷起袖子
keep sth. up one's sleeve 保密
have something up one's sleeve 有秘密
wear one's heart on one's sleeve 将心比心
long sleeves 长袖
short sleeves 短袖
bell-like sleeves 钟形套筒
roll one's sleeves up 卷起袖子
laugh up one's sleeve 捧腹大笑
laugh in one's sleeve 暗自发笑
wear long sleeves 穿长袖