The difference between Deficient and Excessive
When used as adjectives, deficient means lacking something essential, whereas excessive means exceeding the usual bounds of something.
check bellow for the other definitions of Deficient and Excessive
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Deficient as an adjective:
Lacking something essential; often construed with in.
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Deficient as an adjective:
Insufficient or inadequate in amount.
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Deficient as an adjective:
Of a number n, Having the sum of divisors σ(n), or, equivalently, the sum of proper divisors (or aliquot sum) s(n).
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Excessive as an adjective:
Exceeding the usual bounds of something; extravagant; immoderate.
Examples:
"Putting a wide vibrato on a single 16th triplet note at 160 beats per minute seems rather excessive."