Somebody took my things without asking me, without my knowledge and didn't return them back to me.
Is 'stolen' word appropriate to represent this situation? (e.g. He stole my things.) If not, what would be the proper word?
EDIT: What incident actually took place: In my absence, someone took the duster and marker pens and never returned them back to me. So I was looking for a suitable word. I googled for meaning of stolen, but I felt it wouldn't be proper to say so.