Synonyms in Detail: efficace and effective Usage & Differences

What context can I use each word in?

Learn when and how to use these words with these examples!

efficace

Example

Cette méthode est très efficace pour apprendre une nouvelle langue. [efficace: adjective]

Example

Le traitement s'est avéré très efficace pour guérir la maladie. [efficace: adjective]

effective

Example

The new marketing strategy was very effective in increasing sales. [effective: adjective]

Example

The medicine was effective in treating the patient's symptoms. [effective: adjective]

Good things to know

Which word is more common?

Effective is more commonly used than efficace in everyday English language. Effective is a versatile word that can be used in various contexts, while efficace is less common and is typically used in formal or technical contexts in French.

What’s the difference in the tone of formality between efficace and effective?

While efficace is typically associated with a formal or technical tone in French, effective is more versatile and can be employed in both formal and informal contexts in English.

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