Decorous a. : Suitable to a character, or to the time, place, and occasion; marked with decorum; becoming; proper; seemly; befitting; as, a decorous speech; decorous behavior; a decorous dress for a judge.

Example:
piggy was a bubble with Decorous excitement is this a metaphor?

Taxonomy
decorous, Merriam-Webster Online Dictionary, rous, Dictionary, webster, Latin, Word Games, Webster Online Dictionary with audio pronunciations, thesaurus, glossary, english, language, ESL, Search, adjective, Etymology, decorus, decor.

Defination from the web:
decorous from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... and good taste : correct <decorous conduct> — dec·o·rous·ly adverb. — dec·o·rous·ness noun. Learn more about "decorous" with Google Search: ...