Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Language: Old French
Origin: compondre, from Latin componere, from com- ( COM-) + ponere 'to put'

compound

2 verb
     
Related topics: Finance
com‧pound2 [transitive]
1 to make a difficult situation worse by adding more problems
compound a problem/difficulty etc
Helmut's problems were compounded by his lack of concentration.
2 British English to make a bad action worse by doing more bad things
compound a crime/an offence etc
He compounded the offence by calling his opponents liars.
3

be compounded of something

formal to be a mixture of things:
a smell compounded of dust and dead flowers
4 American EnglishBF to pay interest that is calculated on both the sum of money and the interest:
Interest is compounded quarterly.

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