deficient
adjective
[ dɪˈfɪʃ(ə)nt ]
• not having enough of a specified quality or ingredient.
• "this diet is deficient in vitamin B"
• having mental disabilities.
Origin:
late 16th century (originally in the theological phrase deficient cause, denoting a failure or deficiency that has a particular consequence): from Latin deficient- ‘failing’, from the verb deficere (see defect1).
