noun / verb
lather
LATH-er/ˈlæðər/
A frothy mass formed by agitating soap and water.
A mound of fine lather surrounds the wet soap in its dish.

Etymology
Old English leaþr already covered foam and washing substances. The modern noun may have developed anew from the verb, whose earlier senses included covering or soaking something.
In context
without the help or aid of foaming agents or anything like that right this is important because a soap that produces a nice healthy lather easily
More examples
- This shampoo lathers easily, even in cold water.
- He lathers his face before shaving.
- Rinse all the lather out of your hair.
Forms
lather · lathers · lathered · lathering