coreresponsibility

noun
UK /ˌkɔː.rɪˌspɒn.sɪˈbɪl.ə.ti/
US /ˌkɔːr.rɪˌspɑːn.sɪˈbɪl.ə.t̬i/

A core responsibility is the most important job you must always take care of.

Feeding the class pet is a core responsibility for every student in the room.


OTHER MEANINGS

2. A basic duty that is shared by everyone in a group.

Keeping the playground clean is a core responsibility of the whole school.

3. The main thing a person is trusted to look after.

For a lifeguard, watching the swimmers is a core responsibility.

4. An essential part of a job that cannot be skipped.

Checking the brakes is a core responsibility for a bus driver.