Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
opportunity [ɔpəˈtjuːnɪtɪ] n возмо́жность f
to take the opportunity of doing по́льзоваться (воспо́льзоваться perf) слу́чаем что́бы +infin
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: