From an unused root apparently meaning to incise; fennelflower (from its pungency) -- fitches.
H7100. qetsach
קֶ֫צַח noun masculineIsaiah 28:27 black cumin (Nigella sativa Linn.; ᵐ5 μελάνθιον, ᵑ9, gith id.; compare TrNHB 444; Smith DB 2nd ed. FITCHES PostHastings DB ID.); — plant with small black acrid seeds, used as condiment: absolute ׳ק 28:25, 27 (twice in verse).