調査
ちょうさ · chousa · JLPT N3 · noun
investigation
🔍📋 調 examine (as in 調べる) + 査 inspect (as in 検査) = investigation
調 alone gives the verb 調べる, to look into or check. 査 shows up in inspection words like 検査 (inspection) and 審査 (review). Put an examining with an inspecting and you get a formal survey or investigation.