Unmannerly
Definition 1 of 1

Social Situations
Use 'unmannerly' when someone acts inappropriately in social settings, breaking accepted social norms.

Speaking with your mouth full is considered unmannerly.
Cultural Sensitivity
'Unmannerly' can reflect cultural expectations; what's rude in one culture may not be in another.

Refusing food at a dinner may come off as unmannerly in some cultures.
Severity of Rudeness
'Unmannerly' often implies a lighter form of rudeness, not as harsh as insults or offensive language.

Not thanking someone for a gift might be seen as unmannerly.
Compare with
brusquecrassdiscourteousimpoliteimpudentinconsiderateinsolentrude
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