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be on to

Verb CEFR C1

Definitions

To figure out; to realize the truth.

idiomatic

Examples

“I was planning it as a surprise⟳, but I think⟳ he is on to me.”

CEFR level

C1
Advanced
This word is part of the CEFR C1 vocabulary — advanced level.
See all C1 English words →

See also

be one thing be one's own man be one's own worst enemy be oneself be onto nothing be onto something

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