What is the meaning of -aik?

possessive suffix for multiple possessions if there is no noun for the possessor:

1. their ……-s (third-person plural; the pronoun ő (“s/he”) (!) being optional for emphasis)

   their ……-s (third-person plural; the pronoun ő (“s/he”) (!) being optional for emphasis)

   your ……-s (second-person plural, grammatically resembling the third person plural)

   Source: wiktionary.org