verb. Simple past tense and past participle of amass.

"The art collection Mr. Shorenstein amassed with his late wife, Phyllis, included Gustave Caillebotte 's cheery river view from 1882, "The Seine at Argenteuil.""

Nast  aghast  asked  ast  bast  

accumulated  agglomerate  aggregate  assembled  backlogged  

amass