rounder

名词 rounder:

1. a dissolute person; usually a man who is morally unrestrained
   同义词：libertine, debauchee
2. a tool for rounding corners or edges

形容词 round:

1. having a circular shape
   同义词：round, circular
2. (of sounds) full and rich
   同义词：orotund, rotund, round, pear-shaped
3. (mathematics) expressed to the nearest integer, ten, hundred, or thousand
   同义词：round

round.er

n.（名词）
One that rounds, especially a tool for rounding corners and edges.
倒圆式倒角工具：尤指把边和角弄圆的工具
One, such as a security guard, who makes rounds.
巡行者：如来回巡逻的警卫人员
A dissolute person.
浪荡子，放荡的人
Sports
【体育运动】
A boxing match that goes on for a specified number of rounds. Often used in combination:
多回合拳击赛：持续一定回合的拳击赛。常用以构成复合词：
例句：
a five-rounder.
五回合拳击赛

rounders (used with a sing. verb)An English ball game similar to baseball.
rounders （与单数动词连用）跑注式棒球：类似棒球的一种英式球赛