adverbial と (after mimetics)
grammar65 sentences
The optional と that follows mimetic words (擬音語/擬態語) and certain intensifying adverbs to mark them as adverbs modifying the verb. Common with mimetics of action, state, or manner: ぐっすりと眠る ('sleep soundly'), ゆっくりと歩く ('walk slowly'), バタンと閉まる ('close with a slam'). Often optional in casual speech, but lends a slightly more formal, deliberate feel.