調
チョウ, しら.べる, しら.べ, ととの.う, ととの.える, ぎ, つぎ

tune, tone, meter, key (music), writing style, prepare, exorcise, investigate

JLPT3 G3 S15 F87

周# circulate + 言 words → circulate/go about in examining/inspecting (compare 訪) → *examine*; *inspect*; *investigate*; *search*; *look into* → *study*; *look up* (a word). Also, *arrange* (← spread in orderly fashion ← spread widely), *settle* (← examine and settle a matter), *tone* (← smooth; harmonious ← spread smoothly ← spread widely), *condition* (← overall condition ← overall ← spread widely). *Prepare*, *supply* and *purchase* are borrowed meanings.

[Full Kanji Etymology List]