lather

名词 lather:

1. the froth produced by soaps or detergents
   同义词：soapsuds, suds
2. agitation resulting from active worry
   同义词：fret, stew, sweat, swither
3. a workman who puts up laths
4. the foam resulting from excessive sweating (as on a horse)

动词 lather:

1. cover with soap
2. beat severely with a whip or rod
   同义词：flog, welt, whip, lash, slash, strap, trounce
3. form a lather
4. rub soap all over, usually with the purpose of cleaning
   同义词：soap

1. He put some lather on his chin, and then began to shave.
   他在下巴上涂了些肥皂泡沫，然后开始刮脸。
2. Soap will not lather in sea-water.
   肥皂在海水里不起泡沫。

lath.er

n.（名词）
A foam formed by soap or detergent agitated in water, as in washing or shaving.
肥皂泡：在水里搅动肥皂或清洁剂而形成的泡沫，如在洗衣服或剃须过程中
Froth formed by profuse sweating, as on a horse.
汗沫：如马身上流出大量的汗而形成的泡沫
Informal A condition of anxious or heated discomposure; agitation:
【非正式用语】 焦躁：焦急或强烈不安的状况；激动：
例句：
The students were in a lather over the proposed restrictions.
学生们因计划实行的限制而感到不安

v.（动词）
lath.ered,lath.er.ing,lath.ers
v.tr.（及物动词）
To spread with or as if with lather.
以泡沫覆盖：通过或好象是通过肥皂泡来扩散
Informal To give a beating to; whip.
【非正式用语】 给（某人）一顿打；鞭打
v.intr.（不及物动词）
To produce lather; foam.
产生肥皂沫；冒泡
To become coated with lather.
变得涂满肥皂沫

来源：
Probably from Middle English latheren [to wash or soak clothes]
可能源自 中古英语 latheren [洗或浸泡衣服]
from Old English lôthran [to cover with lather] * see leu(…)-
源自 古英语 lôthran [用肥皂泡覆盖] *参见 leu(…)-

【引伸】
lath.erer
n.（名词）
lath.ery
adj.（形容词）