σκληρός dry, i.e. hard or tough (figuratively, harsh, severe)Derivation: from the base of G4628;KJV Usage: fierce, hard. G4628
Thayer:1) hard, harsh, rough, stiff 1a) of men: metaph. harsh, stern, hard 1b) of things: violent, rough, offensive, intolerable
σκληρός sklēros sklay-ros' From the base of G4628; dry, that is, hard or tough (figuratively harsh, severe)KJV Usage: fierce, hard.