Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
richly [ˈrɪtʃlɪ] adv (dressed, decorated) роско́шно, бога́то (rewarded) ще́дро; (deserved, earned) вполне́
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.