transitive. To unfasten (buttons); to undo the buttons of (a garment).

transitive. To take or force out from the breast; to unbosom. Chiefly figurative.

transitive. To bring out from the breast or heart; to give vent to; esp. to disclose, reveal.

To display or reveal.

transitive. Used bombastically for: To disclose.

to nail one's colours (also flag) to the mast (also masthead) and variants: to declare one's opinions or beliefs openly; to stick to or be…

transitive. To disburden one's bosom of; to unbosom; to confess.

transitive. figurative and in extended use. To reveal the contents or inner workings of (something); to cause to open up.

figurative. To reveal or release (an emotion, etc.).