What is the meaning of -nya?

third person singular oblique enclitic pronoun

1. as a possessive adjective

   as a possessive adjective

   as a direct or indirect object

   as an object of a preposition, with the exception for 'di', 'ke', and sometimes 'dalam' (see the usage notes below)

   1. used to mark definiteness

      used to mark definiteness

      used to mark possessive, especially in some context where it needs to be clear

      used to emphasize an adjective

      uses to nominalize an adjective

      used to nominalize a passive verb

      uses to nominalize an active verb

      third person singular dative enclitic

      continuative aspect enclitic

      Third person singular oblique enclitic pronoun.

      1. As a possessive adjective.

         As a possessive adjective.

         As a direct or indirect object

         As an object of a preposition, with the exception for 'di', 'ke'.

         1. Used to mark definiteness.

            Used to mark definiteness.

            Used to mark possessive, especially in some context where it needs to be clear.

            Used to emphasize an adjective.

            Used to nominalize an adjective.

            Used to nominalize a passive verb.

            ↑ As with other enclitic pronouns in the language, it is optional and can be replaced with other terms (depending on the function).

            ↑ This enclitic can also have a plural meaning, especially when referring to objects other than humans.

            ↑ When used in reference to God, the enclitic is capitalized and is prescribed to be separated from the base word with a hyphen, as so:

            Segala puji bagi-Nya.

            All praises to Him.

            ↑ When it is used to emphasize an adjective, the adjective is usually placed in front of the sentence, with the enclitic being stressed in the pronunciation.

            1 2 When it is used to nominalize adjectives or verbs, the suffixed results are dependent (i.e. cannot stand by itself).

            Source: wiktionary.org