Note - Detect - Observe - Witness
These words all mean to see sth, especially when you pay careful attention to it.
Notice to see, hear or become aware of sb/sth; to pay attention to sb/sth: The first thing I noticed about the room was the smell.
Note (rather formal) to notice or pay careful attention to sth: Please note (that) the office will be closed on Monday. This word is very common in business English: Note that the prices are inclusive of VAT.
Detect to discover or notice sth, especially sth that is not easy to see, hear, etc: The tests are designed to detect the disease early.
Observe (informal) to see or notice sb/sth: Have you observed any changes lately? | The police observed a man enter the bank.
Witness (rather formal) to see sth happen: Police have appealed for anyone who witnessed the incident to contact them.
PATTERNS
*to notice/note/detect/observe that/how/what/where/who...
*a to notice/observe/witness sth happen/sb do sth
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Top Tips Abz Ingles - Notes on usage - Synonyms
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