Polite
Courteous
noun, な adjective
ていねい
丁寧 (ていねい) Polite, Courteous
丁寧語 (ていねいご、not on WK) Polite Language (e.g. masu, desu)
失礼 (しつれい) Rude, Rudeness, Impoliteness, Excuse Me
It's Polite to serve Tee てい (tea in German) to your neighbors ねい