examine, diagnose
診察(しんさつ)、診断(しんだん)、診療(しんりょう)
examination, diagnosis, medical treatment
On-reading (シン) is used in compounds; kun-reading (み(る)) is used standalone or with okurigana. Appears in many compounds — memorize the key ones rather than the kanji in isolation. This kanji forms verbs/adjectives with okurigana. Practice both the word form and compound forms.
From the JLP Quiz question bank — the word in the form it is actually tested in.
医者に体を診 ___ もらいました。
Answer: て
患者:あの、今日の午後、診察を予約できますか。
Answer: 今日の午後
【文章③】 日本では、住んでいる市区町村から「健康診断」の案内が届きます。
Answer: 40歳以上