adverb
Used for exact amounts, measurements, or numbers, often with a sense of neatness or no remainder.
かっきり千円で買えた。
I was able to buy it for exactly 1000 yen.
この箱はかっきり10個入っている。
This box contains exactly 10 pieces.
adverb
punctually; exactly on time
Describes arriving or doing something right at the appointed time, without being early or late.
彼はかっきり9時に来た。
He came at exactly 9 o'clock.
adverb taking the 'to' particle
clearly delineated; sharply defined
Used with と to describe boundaries, lines, or distinctions that are sharp and unambiguous.
領地の境界がかっきりと決められた。
The boundaries of the territory were clearly delineated.
Mimetic word; the exact derivation is uncertain, but it likely developed from the sound-symbolic root かっ (katt) suggesting crispness or precision, combined with きり (kiri) meaning 'cut off' or 'limit'.