socijalno

1. socially
   Opština pomaže socijalno ugroženim porodicama. — The municipality helps socially vulnerable families.
   Ta firma posluje socijalno odgovorno. — That company operates in a socially responsible way.

2. colloq. (institution) the welfare office; social services
   Sutra idem u socijalno da predam papire. — Tomorrow I'm going to the welfare office to hand in the papers.

Socijalno ugroženi is the standard phrase for low-income, vulnerable people.