compound
US /ˈkɑːm.paʊnd/
UK /ˈkɑːm.paʊnd/

1.
a thing that is composed of two or more separate elements; a mixture.
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Water is a chemical compound of hydrogen and oxygen.
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The new drug is a compound of several natural ingredients.
1.
make (something bad) worse; intensify the negative aspects of.
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His silence only served to compound her anxiety.
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The company's financial problems were compounded by the economic downturn.
2.
add to (an interest, debt, or problem) by accumulating it.
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Interest is compounded annually.
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His debts continued to compound over time.