Antonyms of adj indecorous

2 senses of indecorous

Sense 1
indecorous (vs. decorous), indelicate -- (lacking propriety and good taste in manners and conduct; "indecorous behavior")

decorous (vs. indecorous) -- (characterized by propriety and dignity and good taste in manners and conduct; "the tete-a-tete was decorous in the extreme")
        => in good taste (predicate) -- (satisfying generally accepted social or esthetic standards)
        => sedate, staid -- (characterized by dignity and propriety)

Sense 2
indecent, indecorous, unbecoming, uncomely, unseemly, untoward -- (not in keeping with accepted standards of what is right or proper in polite society; "was buried with indecent haste"; "indecorous behavior"; "language unbecoming to a lady"; "unseemly to use profanity"; "moved to curb their untoward ribaldry")

INDIRECT (VIA improper) -> proper -- (marked by suitability or rightness or appropriateness; "proper medical treatment"; "proper manners")

Similarity of adj indecorous

2 senses of indecorous

Sense 1
indecorous (vs. decorous), indelicate -- (lacking propriety and good taste in manners and conduct; "indecorous behavior")
          Also See-> improper#1; indecent#2

Sense 2
indecent, indecorous, unbecoming, uncomely, unseemly, untoward -- (not in keeping with accepted standards of what is right or proper in polite society; "was buried with indecent haste"; "indecorous behavior"; "language unbecoming to a lady"; "unseemly to use profanity"; "moved to curb their untoward ribaldry")
       => improper (vs. proper) -- (not suitable or right or appropriate; "slightly improper to dine alone with a married man"; "improper medication"; "improper attire for the golf course")