furrow  Ønoun 1 regular furrows in a ploughed fields  GROOVE | UPSC SSC Q&A Analysis

furrow 

Ønoun
1 regular furrows in a ploughed fields 
GROOVE, trench, rut, trough, ditch, channel, seam, gutter, gouge, hollow, fissure, gash, track. 

2 the furrows on either side of her mouth 
WRINKLE, line, crease, crinkle, crow's foot, cleft, indentation, corrugation; scar; technical sulcus. 

Øverb
his brow furrowed 
WRINKLE, crease, line, crinkle, pucker, crumple, screw up, scrunch up, corrugate. 
-opposite(s): SMOOTH.