Decapitation- Alright kids, look up the french revolution. Explanation found there.

Detonate- Ever seen those spy movies where the bad guys are going to detonate a bomb?

Discard- Use your imagination. You can just yeet them off a bridge or something. Bam. Discarded.

Drown- Water + No air = Dead person

Drugs- Don't do drugs kids! If you don't know what drugs are... good luck in life. MEDICINE IS OKAY IF YOU'RE NOT OVER DOSING!