to warp; to bend backwards; to throw one's head (or shoulders) back; to throw out one's chest
wooden plane with a convex base curved both along the direction of cutting and across the blade
retroflex; retroflex consonant; retroflex sound
wooden plane with a convex base curved in the cutting direction
pied avocet (Recurvirostra avosetta)
Terek sandpiper (Xenus cinereus)