B2 noun /ˈkɜːr.tə.si/
Courtesy
Höflichkeit; Anstand;
Meaning
the showing of politeness in one's attitude and behavior toward others; a polite gesture or remark
Example
He showed great courtesy by holding the door open for elderly people.
Er zeigte große Höflichkeit, indem er die Tür für ältere Menschen offen hielt.