Of course all-share deals are not entirely unknown.
Times, Sunday Times
Such independence of spirit was not entirely unknown.
The Times Literary Supplement
This team of researchers have uncovered an entirely unknown mechanism of stings, as cassiosomes have since been found in other related jellyfish species and could be even more widespread.
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That said, protests based on political persuasion are not entirely unknown to golf.
Times, Sunday Times
Her home town was a place where luxury labels were entirely unknown.
Times, Sunday Times