inadequately
Definitions
In a way that is not enough or not good enough for a particular purpose.
In a manner that lacks the necessary quality, quantity, or competence.
Examples
The building was inadequately prepared for the severity of the storm.
He felt that his previous training had left him inadequately equipped for the new role.
The safety protocols were inadequately enforced, leading to a serious accident.
Synonyms
insufficiently poorly unsatisfactorily incompetently meagerly scantily deficiently
Antonyms
adequately sufficiently satisfactorily competently amply perfectly effectively