Sikkert

The adverb sikkert can also express a degree of uncertainty, despite the fact that the corresponding adjective means sure or certain! The following sentence doesn't contain any more certainty than the sentences using nok:

Det slutter sikkert snart å regne. It will surely stop raining soon.

Very often, sentences that include sikkert express the speaker's desire that something should be true:

Du klarer det sikkert! I'm sure you'll manage! Hun ringer sikkert i morgen! I'm sure she'll call tomorrow.