Antonyms of adj unceremonious

2 senses of unceremonious

Sense 1
unceremonious, unceremonial -- (without ceremony or formality; "an unceremonious speech")

INDIRECT (VIA informal) -> formal -- (being in accord with established forms and conventions and requirements (as e.g. of formal dress); "pay one's formal respects"; "formal dress"; "a formal ball"; "the requirement was only formal and often ignored"; "a formal education")

Sense 2
unceremonious -- (without due formalities; "unceremonious dismissal from office")

INDIRECT (VIA discourteous) -> courteous -- (characterized by courtesy and gracious good manners; "if a man be gracious and courteous to strangers it shows he is a citizen of the world"-Francis Bacon)

Similarity of adj unceremonious

2 senses of unceremonious

Sense 1
unceremonious, unceremonial -- (without ceremony or formality; "an unceremonious speech")
       => informal (vs. formal) -- (not formal; "conservative people unaccustomed to informal dress"; "an informal free-and-easy manner"; "an informal gathering of friends")

Sense 2
unceremonious -- (without due formalities; "unceremonious dismissal from office")
       => discourteous (vs. courteous) -- (showing no courtesy; rude; "a distant and at times discourteous young")