kročiti

1. to step; to set foot
   Nikad više neću kročiti u taj kafić. — I'll never set foot in that café again.
   Armstrong je prvi kročio na Mesec. — Armstrong was the first to set foot on the Moon.
2. (figurative, u + acc.) to enter; to step into
   Kompanija je kročila u novu fazu razvoja. — The company has entered a new phase of development.

Used with u/na + accusative (kročiti u kuću, na Mesec); often in the phrase "kročiti nogom".