adverb, noun or participle which takes 'suru'
Mimetic adverb emphasizing precision, correctness, or neatness. Similar to きちんと but often with a slightly more emphatic or crisp feel. Can also be used as a する-verb.
See also: きちんと
約束の時間にきちっと来てください。
Please come exactly at the promised time.
彼はいつもネクタイをきちっと締めている。
He always wears his tie neatly and precisely.