Main entry: indecorous, indelicate
Definition: lacking propriety and good taste in manners and conduct
Usage: indecorous behavior
Antonyms: decorous
Definition: characterized by propriety and dignity and good taste in manners and conduct
Main entry: indecent, indecorous, unseemly, untoward, unbecoming, uncomely
Definition: not in keeping with accepted standards of what is right or proper in polite society
Usage: was buried with indecent haste; indecorous behavior; language unbecoming to a lady; unseemly to use profanity; moved to curb their untoward ribaldry
Antonyms: proper
Definition: marked by suitability or rightness or appropriateness