effect
B2Formal to neutral
Definition
Meaning
A change that is the result or consequence of an action or other cause.
The state of being operative or functional (e.g., 'in effect'); the creation of a particular impression, especially in visual or sound media; personal belongings.
Linguistics
Semantic Notes
Primarily a noun. As a verb, it is formal and means 'to bring about' or 'to implement', often confused with the more common verb 'affect' (to influence).
Dialectal Variation
British vs American Usage
Differences
No significant semantic differences. The verb 'effect' is slightly more common in formal British administrative/legal contexts.
Connotations
Identical. Both associate 'effect' with consequence, result, or scientific causality.
Frequency
Noun is equally high-frequency in both varieties. The verb is low-frequency and formal in both.
Vocabulary
Collocations
Grammar
Valency Patterns
have an effect on [someone/something]the effect of [cause] on [object]to effect [a change/a policy]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “in effect”
- “to that effect”
- “take effect”
- “cause and effect”
- “with immediate effect”
- “for effect”
Usage
Context Usage
Business
Used in discussing results of policies, market forces, or initiatives (e.g., 'The new strategy had a measurable effect on profitability.').
Academic
Central to scientific and social science writing discussing causality, experiments, and theoretical implications.
Everyday
Used to describe the impact of actions, weather, medicine, or events on people or situations.
Technical
Used in physics (e.g., 'Doppler effect'), media ('visual effects'), law ('binding effect'), and medicine ('adverse effect').
Examples
By Part of Speech
verb
British English
- The new minister will effect several changes to the policy.
- The committee is seeking to effect a compromise.
American English
- The court order was designed to effect his release.
- The CEO promised to effect a major corporate restructuring.
adverb
British English
- The law is effectually a ban on the practice.
- He spoke effectively on the matter.
American English
- The system was effectively shut down.
- The treaty is effectively null and void.
adjective
British English
- The effect size was statistically significant.
- They discussed the policy's effect variables.
American English
- The drug's effect duration was longer than expected.
- Her argument lacked effect evidence.
Examples
By CEFR Level
- The medicine had a good effect.
- The special effects in the film were amazing.
- The new rules take effect next month.
- The teacher's words had a profound effect on the student.
- What are the main effects of climate change?
- The law came into effect in 2020.
- The economic policy failed to produce the desired effect on inflation.
- Her speech was delivered more for dramatic effect than for substance.
- One side effect of the treatment is drowsiness.
- The researchers struggled to isolate the effect of a single variable from the confounding factors.
- The new director effected a sweeping cultural change within the organisation.
- The court's ruling is, in effect, a rewriting of the legislative framework.
Learning
Memory Aids
Mnemonic
Remember the difference: 'Affect' is an Action (verb), 'Effect' is the End result (noun). The rare verb 'effect' means 'to Execute or bring about a result.'
Conceptual Metaphor
EFFECT IS A FORCE (The policy had a strong effect), EFFECT IS A VISIBLE IMPRINT (The scandal left a lasting effect), CAUSES ARE PARENTS/ORIGINS (The effect was born from poor planning).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'affect' (влиять). 'Effect' as a noun is 'эффект, следствие, результат'.
- The Russian word 'эффект' is a close cognate for the noun meaning 'impression' (special effects) but is narrower. Use 'последствие' or 'результат' for 'consequence'.
- The phrase 'in effect' translates as 'фактически, по сути', not directly related to 'эффект'.
Common Mistakes
- Confusing 'affect' (verb) with 'effect' (noun) – 'The weather affected our plans' vs. 'The effect of the weather was significant.'
- Overusing the formal verb 'effect' in everyday contexts where 'cause', 'bring about', or 'make' is more natural.
- Using 'effect' as a verb to mean 'influence' (incorrect: 'The speech effected the audience' – should be 'affected').
Practice
Quiz
Which sentence uses 'effect' correctly as a verb?
FAQ
Frequently Asked Questions
'Affect' is primarily a verb meaning 'to influence' (The weather affects my mood). 'Effect' is primarily a noun meaning 'a result or consequence' (The effect of the weather was noticeable). Rarely, 'effect' is a formal verb meaning 'to bring about' (to effect change).
Very rarely. The verb 'effect' is formal and typically used in official, legal, or academic contexts (e.g., 'to effect a policy change'). In everyday speech, people use simpler verbs like 'make', 'cause', or 'bring about'.
It means 'in practice', 'effectively', or 'for all practical purposes'. It indicates that something is operative or true in its results, even if not officially stated. (e.g., 'The old law is, in effect, no longer enforced.')
Yes. The plural is 'effects', meaning multiple results, consequences, or belongings (e.g., 'the side effects of a drug', 'personal effects').