gubíti to lose
gubíti čas to waste one's time
gubíti čas in trud to waste one's time and trouble (ali pains)
da ne gubimo časa to save time
on ne gubí časa! he doesn't let the grass grow under his feet!
gubíti se v množici to be lost in the crowd
vrh gore se je gubil v oblakih the top of the mountain was lost to sight in the clouds