preposition
cum
kuhm
preposition
1
Combined with; serving as both one thing and another.
"It's a studio-cum-office, used for painting by day and paperwork by night."
noun
1
Vulgar slang for semen or sexual fluid.
"The word is considered crude slang and avoided in polite writing."
How to Use Cum
Learner’s notesIn plain EnglishAs a linking word it means "combined with" (a kitchen-cum-dining room). As slang it's a vulgar term for semen.
When to use it
The "combined with" use is formal/literary; the slang sense is vulgar and inappropriate for most writing.
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Etymology
The "combined with" sense is a learned borrowing of the Latin word cum, meaning "with."