Another word meaning discourteous is disrespectful or rude
" She was very discourteous towards her customers. "
impolite, rude, discourteous
If you are discourteous and impolite you are rude.
In one sense, "discourteous." In another, "sudden."
rude, discourteous, abusive, derogatory, offensive, nasty ,contemptuousopprobrious
" She was very discourteous towards her customers. "
Antonyms for courteous include: impolite, ill-bred, unmannered, discourteous, and uncouth.
Give authority to another
courteous
rude
Discourteous
There are many words that contrast with 'deferential'. Here are some examples: disrespectful, discourteous, uncomplimentary, offensive, rude, insolent, impertinent