D defs.my
Entry 1 sense Webster, 1913

Indecorous

· In·de·co·rous · IPA
01 a. Not decorous; violating good manners; contrary to good breeding or etiquette; unbecoming; improper; out of place; as, indecorous conduct.
  1. 1.
    Not decorous; violating good manners; contrary to good breeding or etiquette; unbecoming; improper; out of place; as, indecorous conduct.
    “It was useless and indecorous to attempt anything more by mere struggle.” Burke.