Calque from Literary Chinese 一言既出,駟馬難追/一言既出,驷马难追. 一(いち)言(ごん)既(すで)に<span class="searchmatch">出</span>(<span class="searchmatch">い</span>)<span class="searchmatch">ずれ</span><span class="searchmatch">ば</span><span class="searchmatch">駟</span>(<span class="searchmatch">し</span>)<span class="searchmatch">馬</span>(<span class="searchmatch">ば</span>)<span class="searchmatch">も</span><span class="searchmatch">追</span>(お)<span class="searchmatch">い</span><span class="searchmatch">難</span>(がた)<span class="searchmatch">し</span> • (ichigon sude ni izureba shiba mo oi gatashi) a word once...
【<span class="searchmatch">一言</span><span class="searchmatch">既に</span><span class="searchmatch">出</span><span class="searchmatch">ずれ</span><span class="searchmatch">ば</span><span class="searchmatch">駟</span><span class="searchmatch">馬</span><span class="searchmatch">も</span><span class="searchmatch">追</span><span class="searchmatch">い</span><span class="searchmatch">難</span><span class="searchmatch">し</span>】 [proverb] a word once spoken is hard to catch even with a four-horse carriage; a word once spoken cannot be undone...