is similar to
lacking social polish
"too gauche to leave the room when the conversation became intimate"; "their excellent manners always made me feel gauche"
is similar to
without artificial refinement or elegance
"plain homely furniture"; "homely manners"
see also
(used of persons and their behavior) not refined; uncouth
"how can a refined girl be drawn to such an unrefined man?"
see also
lacking or showing a lack of what is fitting and considerate in dealing with others
"in the circumstances it was tactless to ask her age"
see also
lacking aesthetic or social taste