To reveal, divulge, or make (something) known; disclose.
To reveal or disclose and show the presence or true character of, especially if unintentionally or incidentally, or else if perfidiously, prejudicially, or to one's discredit.
To expose or rat out (someone).
To inform on, to rat out; to tell a person in authority that someone else has done something wrong.
To cause visible strain to.