get or gather together; "I am accumulating evidence for athe man's unfaithfulness to his wife"; "She is amassing a lot of data for her thesis"
arrange into piles or stacks; "She piled up her books in my living room"
get or gather together; "I am accumulating evidence for the man's unfaithfulness to his wife"; "She is amassing a lot of data for her thesis"; "She rolled up a small fortune"