To Bewray

1. (transitive, archaic) To accuse; malign; speak evil of.
2. (transitive) To reveal, divulge, or make (something) known; disclose.

• (transitive) 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.
• (transitive) To expose or rat out (someone).
• (transitive, obsolete) To expose to harm.
• (transitive, obsolete) To expose (a deception).

This word is often glossed as being a synonym of "betray", but this is only valid for the senses of "betray" that involve revealing information.

(to reveal): expose; reveal or divulge

(to expose or rat out): inform, grass up, snitch; rat out