Courteous is a nine letter word for polite and kind. One should be courteous to everyone they meet, regardless of the circumstances.
courteous
congenial
One possibility is... courteous
Type your answer here... courteous
A seven-letter word for excessively polite is the word "genteel."
congruent
joy
Sir
Loudmouth
Considerate.
Polite is a 6-letter word that is the opposite of rude.
polite
The nine letter word is tolerable.