ぐ
 
っ
 
と

adverb

Onomatopoeic or mimetic word.
  1. suddenly, at once, in one go, with a jerk, with a gulp.
  2. considerably, very much, a lot.
  3. firmly, with an effort, tightly, exerting pressure.
  4. completely (e.g. at a loss).
  5. deeply (e.g. moved).

Variations

Pronunciation Kanji Kana Is Common
 
ぐ
 
っ
 
と
ぐっと
 
グ
 
ッ
 
と
グッと