unmannerly

/ʌnˈmænərli/
adverb
  1. In a rude or ill-mannered way.
    • The child spoke unmannerly to the elderly woman on the bus.
    • They acted unmannerly by leaving the party without saying goodbye.
    • He behaved unmannerly by not standing when the judge entered the room.
adjective
  1. Having or showing bad manners; rude.
    • It is unmannerly to chew with your mouth open in many cultures.
    • The unmannerly boy refused to greet his grandparents when they arrived.
    • She considered his loud phone call in the library to be unmannerly behavior.
Antonyms
What does "unmannerly" mean? | whatsthatwordmean | whatsthatwordmean