Synonyms: unceremonious
Definition: without due formalities
Usage: unceremonious dismissal from office
Similar words: discourteous
Definition: showing no courtesy; rude
Usage: a distant and at times discourteous young
Synonyms: unceremonial, unceremonious
Definition: without ceremony or formality
Usage: an unceremonious speech
Similar words: informal
Definition: not formal
Usage: conservative people unaccustomed to informal dress; an informal free-and-easy manner; an informal gathering of friends