Q: Does the word "use" mean the same thing in "Use your head!" and "I can't use this tool."?

A: the same meaning

Q: Does the word "air" mean the same thing in "The program was on the air from 9 til midnight." and "There was a tension in the air which made me suspect an approaching storm."?

A: different meanings

Q: Does the word "catch" mean the same thing in "Did you catch a cold?" and "If he catches you on the chin, you'll be on the mat."?

A: different meanings

Q: Does the word "want" mean the same thing in "I want to go home now." and "This piano wants the attention of a competent tuner."?

A:
different meanings