Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
become [bɪˈkʌm] irreg like come vi станови́ться*(стать*perf) +instr
to become fat толсте́ть (потолсте́ть perf)
to become thin худе́ть (похуде́ть perf)
to become angry серди́ться*(рассерди́ться*perf)
it became known that ста́ло изве́стно, что
what has become of him? что с ним ста́лось?
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: