cumulate

[v. kyoo-myuh-leyt; adj. kyoo-myuh-lit, -leyt] /v. ˈkyu myəˌleɪt; adj. ˈkyu myə lɪt, -ˌleɪt/
verb (used with object), cumulated, cumulating.
1.
to heap up; amass; accumulate.
adjective
2.
heaped up.
Origin
1525-35; < Latin cumulātus (past participle of cumulāre to heap up, pile up, accumulate), equivalent to cumul(us) a heap, pile, mass, cumulus + -ātus -ate1
Related forms
cumulately, adverb
decumulate, verb (used with object), decumulated, decumulating.
British Dictionary definitions for cumulate

cumulate

verb (ˈkjuːmjʊˌleɪt)
1.
to accumulate
2.
(transitive) to combine (two or more sequences) into one
adjective (ˈkjuːmjʊlɪt; -ˌleɪt)
3.
heaped up
Derived Forms
cumulately, adverb
cumulation, noun
Word Origin
C16: from Latin cumulāre from cumulus heap
Word Origin and History for cumulate
v.

1530s, from Latin cumulatus "heaped, increased, augmented," past participle of cumulare "to heap," from cumulus "mound, heap" (see cumulus). Related: Cumulated; cumulating.