ガチ

がち
adverb, na-adjective, prefix
serious, for real
1. serious, for real, genuine
Emphasizing that something is genuine, earnest, or done with full effort. Slang.
彼(かれ)はガチ勢(ぜい)だから。
He's a hardcore fan, you know.
ガチで勉強(べんきょう)しないと合格(ごうかく)できない。
I have to study seriously to pass.
ガチな話(はなし)、転職(てんしょく)しようと思(おも)っている。
Seriously though, I'm thinking about changing jobs.

ガチ is slang meaning 'genuine', 'serious', or 'for real'. It originates from ガチンコ, a sumo term for a real (non-fixed) match.

GRAMMATICAL USES:

  • ガチで + verb: seriously (adverb)
  • ガチな + noun: serious, genuine (na-adjective)
  • ガチ + noun: hardcore, serious (prefix)

COMMON EXPRESSIONS:

  • ガチで: seriously, for real
  • ガチな話(はなし): serious talk, honestly speaking
  • ガチ勢(ぜい): hardcore fans/enthusiasts
  • ガチ恋(こい): real romantic feelings (not just admiration)
  • ガチ勢(ぜい): serious players/fans (vs casual)

CONTRAST WITH マジ:

  • マジ: really, seriously (general emphasis)
  • ガチ: genuine, hardcore (implies full commitment/intensity)

マジで勉強(べんきょう)する = studying seriously
ガチで勉強(べんきょう)する = studying with full intensity/dedication

REGISTER:
Informal slang. Common among younger speakers and in online/gaming contexts. Not appropriate for formal situations.

Related Words

Synonym: マジ (really)
general
Added 2026.1.16 8:51 · Revised 2026.3.6 12:55
04500/04758_gachi