4 Pics 1 Word Level 475

Answer:
Invent
Hint
What is the answer to the 4 Pics 1 Word level with Person Thinking, Head with Gears, Cavemen Cartoons, and Computer?

Hint
What is the answer to the 4 Pics 1 Word level with Person Thinking, Head with Gears, Cavemen Cartoons, and Computer?