IPA: //ʌnˈθɔː//
KK: /ʌnˈθɔ/
To make something that is frozen become soft or liquid again; to thaw.
I need to unthaw the chicken before I can cook it.
Past: unthawed
Past Participle: unthawed
Unthaw → This word originates from the combination of the prefix 'un-' (meaning not) and 'thaw' (from Old English 'þawian', meaning to melt or become liquid). The term 'unthaw' is often used colloquially to mean to thaw something out, despite the prefix suggesting a negation.
Think of 'thaw' meaning to melt, and remember that 'unthaw' is used to describe the process of making something that is frozen become liquid again.