丁寧

polite, courteous, careful, thorough

t e̞ː n e̞ː → 丁寧だ
adjective Rare #35,320
polite, courteous Often describes speech, behavior, or the way someone treats others.
JA: 店員さんはとても丁寧です。
EN: The shop assistant is very polite.
careful, thorough Often describes work or an explanation done with care.
JA: 彼女は丁寧な説明をしてくれました。
EN: She gave a thorough explanation.

丁寧でしょ

Polite, isn't it?

— 人生スイッチ (2014)

その言葉遣いは、あまり丁寧じゃないね。

That wording isn’t very polite.

日本人は友人と付き合う時はとても丁寧だ。

Japanese people are very polite when interacting with their friends.

ネルソン・マンデラは誰に対しても礼儀正しく丁寧でした。

Nelson Mandela was polite and courteous to everyone.

Sounds similar to