Cases of word usage

1) (the use of) the power to affect a person's character, belief or actions or to get a result e.g. because of a strong personality, wealth etc (influence)

2) having power to affect people or situations (influential)

3) (an instance of) a change in the basic structure of a living or developing organism which can affect the shape, size etc (mutation)

4) to affect (a person, animal) with paralysis; to make (a person, animal) helpless (paralyse)

5) choosing carefully; characterized by choosing (e.g. choosing to affect some and not others) (selective)

6) to affect (a person, hearing etc) strongly (smite)

7) to treat heavily on (something); to affect a person's feelings badly and thoughtlessly (trample)