1 B1 慣用的 ニュートラル
探していないのに、偶然誰かや何かを見つけたり出会ったりすること。
"While hiking in the hills, we happened upon the ruins of an ancient church."
“
I happened upon a copy of Orwell's 'Down and Out in Paris and London' in a second-hand bookshop.
— Commonly cited type of anecdote in literary memoir writing; representative of established idiomatic usage
分離不可