Administer vs Inject

When to use each in English, with meaning, register, and examples.

Administer

FormalTop 3,000 (common)C1verb

Inject

Top 2,000 (common)C1verb
Most formal: AdministerMost common: Inject
 AdministerInject
Pronunciation🇬🇧 /["/ədˈmɪnɪstə(r)/","/ədˈmɪnɪstəz/","/ədˈmɪnɪstəd/","/ədˈmɪnɪstərɪŋ/"]/🇺🇸 /["/ədˈmɪnɪstər/","/ədˈmɪnɪstərz/","/ədˈmɪnɪstərd/","/ədˈmɪnɪstərɪŋ/"]/🇬🇧 /["/ɪnˈdʒekt/","/ɪnˈdʒekts/","/ɪnˈdʒektɪd/","/ɪnˈdʒektɪŋ/"]/🇺🇸 /["/ɪnˈdʒekt/","/ɪnˈdʒekts/","/ɪnˈdʒektɪd/","/ɪnˈdʒektɪŋ/"]/
MeaningTo give or manage something, usually help or medicine.To put a liquid into something using a tool.
ExampleThe nurse will administer the vaccine to all eligible patients.The nurse will inject the vaccine into your arm.
RegisterFormalNeutral
How commonTop 3,000 (common)Top 2,000 (common)
CEFR levelC1C1
Part of speechverbverb
Collocationseffectively, efficiently, centrally, be difficult to, be easy to, be simple toinject medicine, inject a solution, inject confidence, inject energy
Antonymswithhold, denywithdraw, extract
Common mistakesConfused with 'administered' in past tense but forgets the context., Using 'administer' without specifying what is being given., Mixing it up with 'manage', which has a broader meaning.Using 'injection' as a verb instead of 'inject', Confusing with 'intake' when referring to liquids, Using 'inject' incorrectly with non-liquid substances
Usage notesUsed in formal contexts, often when discussing healthcare or management. Not appropriate in casual conversations.Use 'inject' in medical contexts or technology. Avoid in casual conversations unless discussing health or science.

Frequently asked questions: Administer vs Inject

What's the difference between Administer and Inject?

Administer: To give or manage something, usually help or medicine. Inject: To put a liquid into something using a tool.

Which is more formal: Administer and Inject?

Administer is the most formal of these.

Which is more common: Administer and Inject?

Inject is the most common in everyday English.

Are Administer and Inject the same CEFR level?

Administer: C1, Inject: C1 on the CEFR scale.

Can I use Administer and Inject interchangeably?

Not always. Administer and Inject are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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