prikladno

1. appropriately; suitably; fittingly
   Obuci se prikladno, idemo na sahranu. — Dress appropriately, we're going to a funeral.
   Nije prikladno pričati o tome za stolom. — It's not appropriate to talk about that at the table.

Often used as «(nije) prikladno + infinitive / da…» meaning "it is (not) appropriate to…".