調 means “investigate, tune, tone”

しらべる · shiraberu

Also: meter, key (music)

Kun'yomi (Japanese reading)
しらべる, しらべ, ととのう, ととのえる
On'yomi (Chinese reading)
チョウ

JLPT N3 · Taught in grade 3 · 15 strokes

The story

Words (言) that go all the way around (周) a question: checking every side. 調べる is to look something up, 調子 is how things are running, and 調味料, seasoning, is what tunes a dish's flavor.

Used in 調べる (shiraberu, to look up/investigate), 調子 (choushi, condition), and 調査 (chousa, survey)

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Readings from KANJIDIC2, © EDRDG, CC BY-SA.