n.

1. （肥皂水等的）泡沫[U][S1]
2. （马等的）汗沫[U][S1]
3. 【俚】焦急不安；激动[S]
   work oneself into a lather

   变得焦躁不安

vt.

1. 在……上涂以肥皂泡沫；以泡沫（或汗沫）覆盖[（+up）]
   He lathered his chin before shaving.

   他剃须前在下巴上涂上皂沫。

2. 【口】狠狠地打

vi.

1. 起泡沫；形成皂沫
   This detergent lathers easily.

   这种洗洁剂易起泡沫。

2. （马等）冒出汗沫

n.

1. a frothy white mass of bubbles produced by soap when mixed with water.
2. heavy sweat visible on a horse's coat as a white foam.
3. (a lather) informal a state of agitation or nervous excitement.

v.

1. form or cause to form a lather.
   ▸rub with soap until a lather is produced.
2. cover or spread liberally with (a substance).
3. informal thrash (someone).