Simple past tense and past participle of unbosom.(verb)
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Use "unbosomed" in a sentence
""Have a drink," was his invariable reply, though once he unbosomed himself enough to say that"
"Since she had entered into life, and found the difficulty of the part she had to act, to this worthy old lady alone had she unbosomed her secret cares."
"He had thus far unbosomed himself and he knew that it would be reported to the public."