insufficiently
Definitions
To a degree that is not enough or adequate.
In a manner that lacks the necessary quality, amount, or strength.
Examples
The evidence provided was insufficiently detailed to support the researcher's bold claims.
The building was insufficiently insulated, causing the heating bills to skyrocket during the winter.
Synonyms
inadequately scantily meagerly deficiently sparsely unsatisfactorily incompletely
Antonyms
adequately sufficiently amply abundantly plentifully fully completely