More German because I'm on a kick!
Schwer and leicht mean "heavy" and "light" in German respectively. Both can be used to describe the weight of objects but also to describe the difficulty of an action. Kinda like how in English we use the phrases "heavy workload" and "light workload". Something heavy is difficult, something light is easy.
I don't exactly how to explain why I love this so much. It probably has to do with my love of metaphor and interconnectedness.