This is the 626th most frequent Finnish word.
molemmat
"Both."
In this sentence, 'molemmat' is used as a pronoun referring to 'both' people who are friends.
Molemmat ystävät saapuivat ajoissa.
Both friends arrived on time.
Here, 'molemmista' is the partitive case form of 'molemmat', agreeing with the partitive object 'vaihtoehdoista'.
Pidän molemmista vaihtoehdoista.
I like both options.
In this example, 'molemmilla' is in the adessive case, indicating possession together with 'pojilla' (the boys).