inadequate,
unequal lacking the requisite qualities or resources to meet a task; "inadequate training"; "the staff was inadequate"; "she was unequal to the task"
deficient -
of a quantity not able to fulfill a need or requirement; "insufficient funds"
quantity an adequate or large amount; "he had a quantity of ammunition"
depleted,
low no longer sufficient; "supplies are low"; "our funds are depleted"
inadequate,
poor,
short lacking the requisite qualities or resources to meet a task; "inadequate training"; "the staff was inadequate"; "she was unequal to the task"
skimpy,
lean not profitable or prosperous; "a lean year"
scant,
short,
light tending to crumble or break into flakes due to a large amount of shortening; "shortbread is a short crumbly cookie"; "a short flaky pie crust"