Englishfor English speakers
deficient
—
adjective
(= lacking, wanting)
inadequate in amount or degree
a deficient education
deficient in common sense
lacking in stamina
tested and found wanting
—
adjective
(= substandard)
falling short of some prescribed norm
substandard housing
—
adjective
(= insufficient)
of a quantity not able to fulfill a need or requirement
insufficient funds
subspace
—
noun
a space that is contained within another space