1. 下袖长：overarm 上袖长 | underarm 下袖长 | sleeve crown height 袖山高

2. 手臂下的：underage 缺乏 | underarm 手臂下的 | underarmed 武装不够的

3. 腋下：umber 茶紅色 | underarm 腋下 | underlap 下層疊覆

4. 武装的：underagent 代理人的助手 | underarm 武装的 | underauthorities 经有关当局许可

1. 腋下的；腋窝的
    Underarm means in or for the areas under your arms, where they are joined to your body.

    e.g. ...underarm deodorants.
           腋下除臭剂

2. （投球等）低手的，手不过肩的
    You use underarm to describe actions, such as throwing a ball, in which you do not raise your arm above your shoulder.

    e.g. ...an underarm throw.
           低手投球

1. with hand brought forward and up from below shoulder level

    e.g. an underhand pitch
           an underhand stroke

    Synonym: underhandunderhanded

1. with the hand swung below shoulder level

    e.g. throwing a ball underarm

    Synonym: underhand