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supplementation

[ suhp-luh-men-tey-shuhn, -muhn- ]
/ ˌsʌp lə mɛnˈteɪ ʃən, -mən- /
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noun

the act or process of supplementing.
the state of being supplemented.
something that supplements.

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The rainy weather could not ________ my elated spirits on my graduation day.

Origin of supplementation

First recorded in 1850–55; supplement + -ation
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
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