B1
to design or create something which has never existed before
Dictionary examples:
She invented a hat that feeds you snacks during boring meetings. (0.0)
The tired parent invented a machine that automatically folds laundry. (0.0)
The lazy student invented a robot to do his homework for him. (0.0)
The first safety razor was invented by company founder King C. Gillette in 1903. (62.5)