Presumably - Synonyms, Antonyms and Etymology | EWA Dictionary
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Presumably

/prɪˈzjuːməbli/
Used to say that you think something is true based on what you know, though there's no definite proof.

Synonyms:

Antonyms:

Examples:

Presumably, she is at the office today.You presumably forgot to lock the door again.

Etymology:

etymology
Originating in the early 18th century, the word presumably derives from the Latin præsūmere, meaning to take beforehand or suppose, combined with the adverbial use of ably, suggesting capability.

Usage Statistics:

14 mentions per 1 million words Frequency
Moderate
bulb Hint: Frequency according to COCA
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