amass

 
Pronunciation: /əˈmas/

verb

[with object]
  • gather together or accumulate (a large amount or number of material or things) over a period of time: he amassed a fortune estimated at close to a million pounds
  • [no object] archaic gather together in a crowd or group: the soldiers were amassing from all parts of Spain

Derivatives

amasser

noun

Origin:

late 15th century: from French amasser or medieval Latin amassare, based on Latin massa 'lump' (see mass)