出典:Wiktionary
Use as "special skill" from 1580.[1] Possibly from 14th century Middle English krak (“a sharp blow”), knakke, knakken, from Middle Low German, by onomatopoeia. Latter cognate to German knacken (“to crack”). See also crack.
こつりと(音を立てる)
プーク
a plaything with which one trifles for pleasure
名詞の変化形:
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