discourteous
informal
Bohemian
abrupt
affable
bluff
blunt
brusque
casual
cordial
curt
degage
easy
easygoing
familiar
folksy
free and easy
gracious
gruff
haymish
homely
homey
inconsiderate
irregular
loose
natural
offhand
offhanded
plain
relaxed
sharp
simple
sociable
thoughtless
unaffected
unassuming
unconstrained
unconventional
ungracious
unofficial
unstudied
boorish
brotherly
businesslike
ceremonious
churlish
cursory
free-and-easy
friendliest
hasty
impolite
indecorous
laconic
peremptory
perfunctory
testy
unannounced
uncivil
undignified
ungraceful
Antonius
acrimonious
erroneous
felonious
harmonious
parsimonious
sanctimonious
formal