サボる
サボる · saboru · JLPT N1 · verb-godan
to cut classes
🏫 サボる = サ(sabo) from sabotage: skipping work to undermine it, like a saboteur
Borrowed from English 'sabotage' via the verb サボタージュ, shortened to サボ plus る. Think of skipping class as quietly sabotaging your own duties.