1. 〔手探りで〕grope for and find ((a thing));〔探して見つける〕hunt out, discover;〔場所をつきとめる〕locate ⇒さがしだす(探し出す)
    • 手を伸ばしてやっとスイッチを探り当てた
    • He reached out and groped around until he found the switch.
    • 鉱脈を探り当てる
    • locate [discover] a vein of ore
    • 人の心中を探り当てる
    • find out 「how a person feels [what a person really thinks]
    • やっとうわさの出所を探り当てた
    • Finally we ran down the source of the rumor.