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出典:Wiktionary
出典:『Wiktionary』 (2025/02/02 01:58 UTC 版)
From ack (“A”) + ack (“A”), RAF WWI signalese for AA (“anti-aircraft”). (In modern signalese it would be called alpha-alpha.)
ack-ack (countable and uncountable, plural ack-acks)
名詞の変化形:
ack-ack