U

ceremoniously

adjective

carefully observant of ceremony; formally or elaborately polite: He greeted his rival with a ceremonious display of friendship.
pertaining to, marked by, or consisting of ceremony; formal: a ceremonious reception.

adjective

especially or excessively polite or formal
observing ceremony; involving formalities

adj.

1550s, from Middle French cérémonieux or directly from Late Latin caerimoniosus, from Latin caerimonia (see ceremony). Meaning “full of show and ceremony” is from 1610s. Related: Ceremoniously; ceremoniousness.