For the verb: "to buy"

Simple Past: bought
Past Participle: bought

WordReference Random House Learner's Dictionary of American English © 2014
bought /bɔt/USA pronunciation  v. 

    a pt. and pp. of buy.

Collins Concise English Dictionary © HarperCollins Publishers::

bought /bɔːt/ vb
  1. the past tense and past participle of buy

'bought' also found in these entries:
In the English description:

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