She positions herself as a formidable intellect, a woman who has passed the point where she worries about whether or not to tie her hair back.
Times, Sunday Times (2014)
He combined a formidable intellect with good humour and he had a keen ability to defuse difficult situations.
Times, Sunday Times (2006)
One reason for this is undoubtedly his formidable intellect.
Times, Sunday Times (2007)