Longman Dictionary of Contemporary English - affect

~ S1 W1 v 1 to do something that produces an effect or change in someone or something  (a disease that affects the central nervous system | emergency relief for the areas affected by the hurricane) 2 usually passive to make someone feel strong emotions  (How will the tax affect people on low incomes? | We were all deeply affected by the news of her death.) 3 formal to pretend to have a particular feeling, way of speaking etc  (Simon affected boredom to make me think he didn't care. | to affect a foreign accent)  ( USAGE NOTE: AFFECT WORD CHOICE: ~, effect ^~ is the usual verb and effect is the usual noun How do you think the changes will affect (v) you? (NOT affect on/to/in you). What effect (n) do you think the changes will have on you? The verb effect is fairly formal and is only used in particular meanings, for example, you might effect changes or a plan of action (=make them happen). It does not mean the same as ~. )