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to spill; to drop; to shed (tears)
to grumble (about); to complain (of)
to let (one's feelings) show
うっかりコップの水を溢してしまった。
I accidentally spilled the water from the glass.
牛乳を溢さないでね。
Don't spill the milk.
溢さないように気をつけてお皿を運んでいる。
I'm carrying the plates carefully so as not to spill.