■ noun
1》 a mass of small bubbles in liquid caused by agitation, fermentation, or salivating.
↘impure matter that rises to the surface of liquid.
2》 worthless or insubstantial talk, ideas, or activities.
■ verb form, produce, or contain ~.
Derivatives
~ily adverb
~y adjective ( ~ier , ~iest ).
Origin
ME: from ON ~a , frauth .