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scarce
deficient in quantity or number compared with the demand
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bare, scanty, spare
lacking in amplitude or quantity
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exiguous
extremely scanty
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hand-to-mouth
providing only bare essentials
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hardscrabble
barely satisfying a lower standard
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measly, miserable, paltry
contemptibly small in amount
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minimal, minimum
the least possible
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deficient, insufficient
of a quantity not able to fulfill a need or requirement