This is the 17th most frequent Slovenian word.
jih
"Them" (accusative form).
In this sentence, 'jih' functions as an accusative pronoun representing a plural object, meaning 'them', in the context of the action 'invite'.
Zakaj jih nisi povabil na zabavo?
Why didn't you invite them to the party?
Here, 'jih' is again a pronoun in the accusative case, indicating the direct objects of the verb 'see', referring to multiple people.
Vidim jih vsak dan, ko se sprehajam po parku.
I see them every day when I walk in the park.
In this instance, 'jih' appears twice, each time as an accusative pronoun for 'them', signifying the individuals being met and greeted.