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In some senses, sud is marked as informal. Watch for register when choosing this word.
sud
/sʌd/
noun 4name 1
Definitions
noun
1
A bubble of lather or foam (the singular of suds).
There is a beer sud parked on her upper lip.
name
1
A department in Haiti.
noun
1
Acronym of subjective unit of disturbance.
2
Acronym of substance use disorder.
3
Acronym of sudden unexplained death.
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