出典:Wiktionary
出典:『Wiktionary』 (2026/04/09 00:00 UTC 版)
Ultimately from Latin contrā.
contra (third-person singular simple present contras, no present participle, no simple past or past participle)
From Proto-Italic *komterād, ablative singular feminine of *komteros (“the other of the two who meet, opposite”). The ablative singular masculine/neuter of the same is continued in Latin contrō-, cognate to Oscan contrud. Ultimately from *kom- + *-teros; thus, a doublet of cum, comparable to the relation between intrā and in, and extrā and ex, but unlike these lacking external cognates, and therefore of Italic origin.
The change from instrumental/ablative to accusative is caused by *-teros used adverbially.
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反対のこと
the opposite
逆になる
反対にすること
反対すること
to be dead against anything
正反対の.
the opposite way