究

jiū
#429 most
frequent character
after all, to investigate

Character breakdown

Source: Make Me a Hanzi.

究 pairs 穴 cave or empty with 九 jiǔ, which marks the sound. It first meant to exhaust a supply. From using up came scrutinize or study, seek or investigate, and end.

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Homophones

揪jiū
to hold tight
纠jiū
to gather together, to investigate

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