adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
Describes something fitting, closing, or matching with no gaps or looseness; often used for schedules, agreements, or physical fits.
蓋をかっちり閉めてください。
Please close the lid tightly.
予定がかっちり決まっている。
The schedule is fixed precisely.
adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
Used for clothing that fits snugly, a body that is toned and firm, or a lean physique.
彼はかっちりしたスーツを着ている。
He is wearing a close-fitting suit.
毎日運動して、かっちりした体になった。
I exercised every day and got a firm body.