出典:Wiktionary
出典:『Wiktionary』 (2024/07/28 00:29 UTC 版)
Perhaps from the old practice of knocking under the table with the knuckles, when conquered. Compare knuckle under
knock under (third-person singular simple present knocks under, present participle knocking under, simple past and past participle knocked under)
複合動詞の活用形:
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