rebuff

nouns

a deliberate discourteous act (usually as an expression of anger or disapproval)
rebuff, slight
an instance of driving away or warding off
rebuff, repulse, snub

verbs

reject outright and bluntly
"She snubbed his proposal"
rebuff, repel, snub
force or drive back
"repel the attacker"; "fight off the onslaught"; "rebuff the attack"
drive back, fight off, rebuff, repel, repulse