suds

From the plural of sud, a variant of sod (“a bubbling or boiling”), equivalent to sud +‎ -s. Related to seethe.

• IPA^(key): /sʌdz/

suds (uncountable)

1. lather, foam
2. (slang) beer

   We went out for some pizza and suds.

• Sometimes treated as uncountable ("too much suds") and sometimes as plural ("too many suds").

• oversuds
• soapsuds
• suds up

suds (third-person singular simple present sudses, present participle sudsing, simple past and past participle sudsed)

1. (transitive) To cover with, or as if with, soapsuds.

   We sudsed the car before washing it down until it gleamed like new.