This is the 3012th most frequent Polish word.
organizacjom
"Organizacjom" means "to organizations" in English.
Here, 'organizacjom' is the dative form of 'organizacja' because it is used as the indirect object of the verb 'dziękujemy' (we thank).
Dziękujemy wszystkim organizacjom za wsparcie.
We thank all organizations for their support.
In this sentence, 'organizacjom' signifies the dative plural form as it indicates the recipients of assistance.
Pomogliśmy organizacjom w przygotowaniach do wydarzenia.
We assisted the organizations in preparations for the event.
Here, 'organizacjom' again takes the dative plural form, marking the entities receiving the donations.