This is the 326th most frequent Slovenian word.
lepo
"Beautiful" or "nice."
Here, 'lep' (beautiful) describes the noun 'pogled' (view), specifically the aesthetic quality of the scene.
Pogled na gore je zelo lep.
The view of the mountains is very beautiful.
Here, 'lep' (the masculine form of 'lepo') is used as an adjective to describe the noun 'dan' (day), meaning 'beautiful.'
Lep dan vam želim.
I wish you a beautiful day.
In this sentence, 'lepo' is used as an adverb, implying consideration or kindness in one's action.