This is the 578th most frequent Czech word.
rodiče
Parents.
The word 'rodiče' is used here in the nominative plural form to indicate 'parents' as the subject of the sentence.
Moji rodiče žijí v Praze.
My parents live in Prague.
In this case, 'rodiče' is in the accusative plural form because it is the direct object of the verb 'mít rád'.
Mám rád rodiče své přítelkyně.
I like my girlfriend's parents.
Here, 'rodiči' is in the instrumental plural form, as it is used with the preposition 's' (with) to indicate the company involved in the action.