1. to take (over), to take on, to adopt (Core idea is taking on a share from someone. Works in a wide range of contexts, similar to English. Also for responsibilites and positions. )
2. to take on too much ("sich+Acc übernehmen" - mostly in context of work or tasks)
3. to get a proper contract (Same idea as the first one. The idea is that a company gives a freelancer or an intern an actual real position after a time.)