Namjachingu vs Aein: Boyfriend vs Lover/Partner in Korean

남자친구 specifically refers to a male romantic partner (boyfriend), while 애인 is a gender-neutral term for any romantic partner or lover.

Side-by-Side Comparison

	남자친구 (namjachingu)	애인 (aein)
Gender specificity	Male partner only	Gender-neutral, any romantic partner
Formality	Neutral, commonly used	Slightly more poetic or literary feel
Relationship stage	Typically for an official dating relationship	Can refer to a partner at any stage, including long-term
Usage in writing	Common in conversation and texts	More common in song lyrics, literature, and heartfelt contexts
Equivalent female term	여자친구 (yeojachingu) = girlfriend	No gendered counterpart — 애인 covers both

Asking a friend about her boyfriend — using 남자친구

남자친구랑 어제 뭐 했어?

What did you do with your boyfriend yesterday?

Telling someone you have a boyfriend — using 남자친구

저는 남자친구가 있어요.

I have a boyfriend.

Mentioning a partner without specifying gender — using 애인

제 애인 소개해도 될까요?

May I introduce my partner?

A song lyric about missing a loved one — using 애인

애인이여, 보고 싶어.

My love, I miss you.

✗Confusing 남자친구 (boyfriend) with 남자 친구 (male friend) — the space matters. Without a space, it means boyfriend; with a space, it just means a male friend.
✗Using 애인 in very casual contexts — it can sound slightly dramatic or old-fashioned compared to 남자친구/여자친구 in everyday speech.
✗Assuming 애인 only means a secret lover — in modern Korean it simply means romantic partner and carries no secretive connotation.

What is the difference between 남자친구 and 남자 친구?

남자친구 (no space) means boyfriend, while 남자 친구 (with a space) means a male friend. The spacing changes the meaning entirely.

Is 애인 appropriate to use in formal settings?

Yes — 애인 is perfectly acceptable in both casual and formal contexts, though in very official settings 파트너 (partner) is also used.

Practice using 남자친구 and 애인 in real conversations with AI.