Nouns

(n)rebuff, snub, repulsean instance of driving away or warding off
(n)snub, cut, cold shouldera refusal to recognize someone you know“the snub was clearly intentional”

Verbs

(v)ignore, disregard, snub, cutrefuse to acknowledge“She cut him dead at the meeting”
(v)rebuff, snub, repelreject outright and bluntly“She snubbed his proposal”

Adjectives

(s)snubunusually short“a snub nose”