incompetence
incompetence
/ɪnˈkɒmpɪtəns/
(also less frequent incompetency  /ɪnˈkɒmpɪtənsi/  /ɪnˈkɑːmpɪtənsi/)
the lack of skill or ability to do your job or a task as it should be done
professional incompetence
police incompetence
He was dismissed for incompetence.
Collocations
adjective
verb + incompetence
accuse somebody/something of… preposition
incompetence  at
incompetence  in
incompetence  on the part of