/'lɑ:ðə(r), also 'læð-; [US] 'læð-; `læðɚ/
n
1 [U] white foam or froth produced by soap or detergent mixed with water （皂液或洗涤液的）泡沫
*work up a lather on one's chin, ie before shaving 在下巴上涂皂沫（然後再刮胡子）.
2 [U] frothy sweat, esp on a horse 汗沫（尤指马的）.
3 (idm 习语) be in/get into a `lather (infml 口)
(a) be/become excited and nervous 激动; 紧张
*She's in a lather about having to speak to such a large crowd. 她须在这么多人面前讲话, 心情十分紧张.
(b) be/become angry, agitated and upset 气愤; 烦乱; 烦恼
*Calm down there's no need to get into a lather about it! 冷静些--没有必要为这件事动肝火!

v
1 [I, Ip] ~ (up) form lather 起泡沫
*Soap will not lather in sea-water. 肥皂在海水里不起泡沫.
2 [Tn] cover (sth) with lather 给（某物）涂皂沫
*lather one's chin before shaving 刮胡子前先在下巴上涂皂沫.
3 [Tn] (dated infml 旧, 口) thrash (a person or an animal) 抽打（人或动物）.