Translation guide
The English word 'cum' has two main uses: a preposition meaning 'combined with' or 'also used as', and a slang noun for semen or orgasm. This guide covers both, with a focus on natural Japanese equivalents.
Expressing that something serves two functions or roles simultaneously, often in a hyphenated compound like 'kitchen-cum-dining room'.
The most common way to express 'cum' in the sense of 'also serving as'. Attach 兼 (けん) between two nouns to indicate dual purpose.
This room is a study-cum-guest room.
He works as a driver-cum-guide.
A more descriptive pattern using the verb 兼ねる (to serve both as). Often used when the dual function is more nuanced or when modifying a noun.
an office-cum-reception room
Used for objects designed for dual use. 兼用 (けんよう) means 'combined use'.
a kitchen-cum-dining room
Referring to semen or the act of ejaculation/orgasm in a vulgar or informal context.
The most common slang term for semen, borrowed from German 'Samen'. Used in casual and vulgar contexts.
He swallowed cum.
The formal/medical term for semen. Not slang, but can be used in explicit contexts.
I had a semen analysis.
Slang verb meaning 'to cum' (have an orgasm). Often used in sexual contexts.
I'm about to cum.
Formal/medical verb for 'to ejaculate'. Not slang, but used in explicit or clinical descriptions.
He ejaculated.
Do not use カム or クム to translate the preposition 'cum'. These are not understood in Japanese. Use 兼 or related patterns instead.
ザーメン and イク are casual and often vulgar, suitable for informal or sexual contexts. 精液 and 射精する are clinical and appropriate for medical or formal discussions. Choose based on context.