Know what vs Recognize

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

Know what

Top 2,000 (common)

Recognize

Top 1,000 (very common)A2verb
Most common: Recognize
 Know whatRecognize
Pronunciation🇬🇧 //nəʊ wɒt//🇺🇸 //noʊ wɑt//🇬🇧 /["/ˈrekəɡnaɪz/","/ˈrekəɡnaɪzɪz/","/ˈrekəɡnaɪzd/","/ˈrekəɡnaɪzɪŋ/"]/🇺🇸 /["/ˈrekəɡnaɪz/","/ˈrekəɡnaɪzɪz/","/ˈrekəɡnaɪzd/","/ˈrekəɡnaɪzɪŋ/"]/
MeaningTo understand or be aware of something.to see or know someone or something again
ExampleDo you know what I mean?I can recognize her voice even when she is not in the room.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR level-A2
Part of speechverb
Collocationsknow what you mean, know what you're talking about, know what to do, know what I want, know what I saidimmediately, instantly, correctly, learn to, be easy to, as, by, from, clearly, fully, belatedly, must, need to, begin to, as, be commonly recognized, be generally recognized, be universally recognized, clearly, federally, formally, agree to, refuse to, as, be legally recognized, a refusal to recognize something
Antonyms-ignore, overlook, miss
Common mistakes'Know what' is often confused with 'do you know'., Some learners forget to use it as a standalone phrase., Incorrectly use 'know what' without context, making it unclear.Confusing 'recognize' with 'realize', Using 'recognize' without an object (e.g., 'I recognize' instead of 'I recognize her'), Mixing up tenses, like saying 'recognized' instead of 'recognize' in present situations
Usage notesUsed in both spoken and written English. Common in informal conversations to clarify understanding.Use 'recognize' when acknowledging something you already know. It's appropriate for everyday conversations but avoid in situations requiring formal language, like legal documents.

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Know what
Recognize

Frequently asked questions: Know what vs Recognize

What's the difference between Know what and Recognize?

Know what: To understand or be aware of something. Recognize: to see or know someone or something again

Which is more common: Know what and Recognize?

Recognize is the most common in everyday English.

Can you show an example of each?

Know what: Do you know what I mean? Recognize: I can recognize her voice even when she is not in the room.

Can I use Know what and Recognize interchangeably?

Not always. Know what and Recognize 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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