deficient
adjectiveUK /dɪˈfɪʃənt/
US /dɪˈfɪʃənt/
Not having enough of something you need.
The plant looked sick because it was deficient in sunlight.
RELATED WORDS
OTHER MEANINGS
2. Not good enough or not meeting a standard.
The report was deficient in several important details.
3. Having a lower amount of a nutrient than is healthy.
The doctor said he was deficient in vitamin D.
4. Missing a part or piece that should be there.
The old bridge was deficient in safety rails.