In the passenger seat, there's a man, buttoned-down shirt and furrowed brow.
He remained silent for a second or two as he just furrowed his brows and studied the photo.
Cameras panning to American fans showed dispirited faces, furrowed brows.
Old English furh "furrow, trench," from Proto-Germanic *furkh- (cf. Old Frisian furch "furrow;" Middle Dutch vore, Dutch voor; German Furche "furrow;" Old Norse for "furrow, drainage ditch"), from PIE *perk- (cf. Latin porca "ridge between two furrows," Old Irish -rech, Welsh rhych "furrow"). "Some scholars connect this word with Latin porcus, Eng. FARROW, assigning to the common root the sense 'to root like a swine.' " [OED]
early 15c., "to plow," from furrow (n.). Meaning "to make wrinkles in one's face, brow, etc." is from 1590s. Related: Furrowed; furrowing.
furrow fur·row (fûr'ō, fŭr'ō)
A rut, groove, or narrow depression.
A deep wrinkle in the skin, as on the forehead.
an opening in the ground made by the plough (Ps. 65:10; Hos. 10:4, 10).