inadequate
US /ɪˈnæd.ə.kwət/
UK /ɪˈnæd.ə.kwət/
1.
lacking the quality or quantity required; insufficient for a purpose
:
•
The food supply was inadequate to feed all the refugees.
•
His performance was inadequate for the demands of the job.
2.
unable to deal with a situation or with life
:
•
She felt completely inadequate to handle the new responsibilities.
•
He often feels inadequate in social situations.