unthawed; unthawing
: thaw
A fuel station operator apparently caused the 5:30 a.m. blast by using an open flame to unthaw a frozen tank valve …—
Associated Press
Associated PressEscape the winter freeze and unthaw in beautiful tropical settings …—Business Wire
Business WireNote: Although unthaw as a synonym of thaw is sometimes cited as an illogical error, it has persisted in occasional use for more than four centuries. It occurs in both American and British English.
Cite this Entry
“Unthaw.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unthaw. Accessed 9 Sep. 2025.
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