inadequate
adjectiveUK /ɪnˈæd.ə.kwət/
US /ɪnˈæd.ə.kwət/
Not good enough for what is needed.
The small umbrella was inadequate in the heavy rain.
RELATED WORDS
OTHER MEANINGS
2. Not able to do something well enough.
He felt inadequate when asked to fix the broken engine.
3. Not enough in amount or number.
The food supplies were inadequate for the whole group.
4. Not meeting a standard or requirement.
The safety measures were inadequate and had to be improved.