This is the 48th most frequent Danish word.
helt
"Hero" or "completely," depending on context.
Here 'helt' means 'completely' and is used as an adverb to emphasize the certainty described by the adjective 'sure'.
Jeg er helt sikker.
I am completely sure.
Here 'helt' means 'hero' and is used as a noun to describe someone who is exceptionally brave or admired.
Han er en helt.
He is a hero.
Here 'helt' takes a nuanced usage, modifying the verb to indicate an incomplete or imperfect action of understanding.