診 means “examine (a patient)”

しん · shin

Also: checkup, seeing, diagnose, examine

Kun'yomi (Japanese reading)
みる
On'yomi (Chinese reading)
シン

JLPT N1 · Taught in secondary school · 12 strokes

The story

Words (言) beside a person (人) over three lines (彡): picture a doctor asking questions and studying every line of your face. 診察 is a consultation, 診断 a diagnosis, and a clinic door reading 本日休診 means closed today.

Used in 診察 (shinsatsu, medical examination), 診断 (shindan, diagnosis), and 診る (miru, to examine a patient)

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