Definition of unbosom in English:

unbosom

verb

[WITH OBJECT]archaic
  • Disclose (one's thoughts or secrets)

    ‘she unbosomed herself to a trusty female friend’
    • ‘I pray you, therefore, to unbosom yourselves of all your doubts.’
    • ‘‘Reet, that does it’, said the GA, and stumped round to unbosom himself of the accumulated chagrin of the last month.’
    • ‘It was he himself who overheard the secret utterances of Crazy Horse - that he had sat behind him, enveloped in his blanket when the chief was unbosoming himself, supposedly in secret.’
    open one's heart, unburden oneself, confess, tell all, tell one's all
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Pronunciation

unbosom

/ʌnˈbʊz(ə)m/