This is the 33rd most frequent Slovenian word.
zelo
Very.
'Zelo' is used as an adverb to intensify the adjective 'vesel' (happy).
Zelo sem vesel, da sem te srečal.
I am very happy to have met you.
'Zelo' is used to emphasize the adjective 'lepa' (beautiful).
Tvoja hiša je zelo lepa.
Your house is very beautiful.
'Zelo' amplifies the adjective 'težko' (difficult).