How to say "poetry" in Arabic

Shiʿr looks and sounds like Hebrew שִׁיר (shir, "song, poem") — but the letters don't actually correspond: Hebrew ש should match Arabic س or ث, not ش, and the middle radical doesn't line up either (י vs ע). Coincidence aside, shiʿr's real root ش-ع-ر means "to perceive, sense, know" — a poet is, etymologically, one who knows.