ganga úr skugga um

From ganga (“to walk”) + úr (“from”) + skugga, the singular dative of skuggi (“a shadow”) + um (“about”). Literally meaning to "walk from a shadow about" or to "walk from the shadow about something".

ganga úr skugga um (strong verb, third-person singular past indicative gekk úr skugga um, third-person plural past indicative gengu úr skugga um, supine gengið úr skugga um)

1. (idiomatic, governs the accusative) to ascertain, to make sure of something

   Ég vildi ganga úr skugga um að hún væri farin að sofa.

   I wanted to make sure she's asleep.

• (to ascertain): fá fullvissu um, komast að, komast eftir