The most common affect synonym is influence, with impact, change, alter and shape close behind. Each one signals that one thing makes a difference to another: rain affects traffic, so rain influences traffic.
Affect has three other jobs as well. It can mean harm (the disease affects the lungs), stir emotion (the story affected her deeply) and, in formal writing, pretend (he affected a calm voice). Each one needs its own words, and the forms affects and affected are covered further down.
Swatch at a glance
Best swaps
influence, impact, change, alter, shapePart of speech
VerbMost formal
bear on, afflict, feignMost casual
hit, get to, mess withStrongest
transform, devastate (for harm)Antonyms
leave unchanged, spareWatch out
Affect is usually the verb and effect the noun. The weather affects the crops; the weather has an effect on the crops.Word forms covered
affects, affected, affecting
Four senses, four sets of swaps
| Sense | Try | Example |
|---|---|---|
| Make a difference | influence, impact, alter, shape | Diet shapes long-term health. |
| Harm | damage, hit, strike, afflict | The frost hit the orchards hard. |
| Stir feelings | move, touch, upset, disturb | His speech moved the crowd. |
| Pretend | feign, put on, fake, assume | She feigned surprise at the party. |
The first row covers most everyday writing. The last row is rare outside novels and formal prose.
Picking an affect synonym by strength
On the chip strip, sway is a gentle push, often on opinions: ads sway buyers. Influence is the all-purpose middle. Shape means affecting how something forms over time. Change says the result is different. Transform means it is different through and through.
When the effect is bad, switch scales. Hurt and damage are clear; devastate and cripple are the extreme end, best for disasters.
Sentences with the swap made
- Stress can affect sleep becomes stress can disturb sleep.
- The new rule affects all staff becomes the new rule impacts all staff.
- Prices affect what people buy becomes prices influence what people buy.
- The drought affected farmers becomes the drought hit farmers or the drought took a toll on farmers.
- The documentary affected me becomes the documentary moved me.
- He affected an accent becomes he put on an accent.
In a lab report: "Temperature affects the reaction." A reader wants to know how. "Higher temperature speeds up the reaction" swaps the vague verb for a precise one, and that kind of precision usually wins.
Affects, affected and affecting
A good affects synonym is influences or impacts: noise impacts focus. For affected, the choice turns on the sense. People hurt by an event are impacted, hit or harmed, and the most neutral affected synonym in news writing is simply those involved. Someone emotionally affected is moved, touched or shaken.
As an adjective, affected can also mean fake and showy: an affected laugh is forced, artificial or put on. Affecting as an adjective means moving: a touching scene.
Affect or effect, and other traps
Use affect as the action and effect as the result. A trick: A for action, E for end result. Effect can be a verb too, but mainly in formal phrases like effect change, meaning bring it about. For the noun, visit effect synonyms.
Impact as a verb is now common in business, though some editors still prefer affect. Infect only looks related; it means spread disease.
Antonyms and phrases
Affect has no single neat opposite. Use phrases: leave unchanged, leave untouched, have no bearing on. Spare works in the harm sense: the storm spared the village. For people, be immune to or shrug off fit: she shrugged off the criticism. To describe an effect that hurt someone, browse hurt synonyms too.
Frequently asked questions
What is another word for affect in an essay?
Influence, shape and alter suit academic writing. Go for whichever verb best names how the change happens.
Is impact an acceptable swap for affect?
Yes, impact is widely used as a verb, especially in business and news. In very formal writing, some editors still prefer affect or influence.
What is a synonym for negatively affect?
Harm, damage, undermine and weaken. Hurt is the plain choice for people and feelings.
How do I remember affect vs effect?
Affect is the action, effect is the end result. Think A for action and E for end.
What does affected mean as an adjective?
It can mean influenced or harmed, or it can mean fake and showy, as in an affected accent. Artificial and put on fit that second sense.
Which word means affect someone emotionally?
Move and touch are the warm choices. Upset and disturb fit when the feeling is painful.