The Sanskrit language incorporates three genders: feminine, masculine and neuter. All nouns have inherent gender, but with some exceptions, personal pronouns have no gender. Exceptions include demonstrative and anaphoric pronouns. Derivation of a word is used to express the feminine. Two most common derivations come from feminine-forming suffixes, the "-ā-" (आ, Rādhā) and "-ī-" (ई, Rukmīnī). The masculine and neuter are much simpler, and the difference between them is primarily inflectional. Similar affixes for the feminine are found in many Indo-European languages, states Burrow, suggesting links of the Sanskrit to its PIE heritage.