Which has not been thawed: still frozen(adjective)
Simple past tense and past participle of unthaw.(verb)
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Use "unthawed" in a sentence
"And Pacquiao is the only man on earth who can restore the "Rocky III" anthem "Eye of the Tiger" to its pre-ironic, 1982 glory, as he did on Saturday night, entering the ring at the MGM Grand accompanied not just by the bombastic song, but also by its original singer—Survivor's Jimi Jamison, who wore leather pants and appeared unthawed from Reagan's first term."
"(This soup also stores well frozen to be unthawed and enjoyed later in the winter.)"
"This somewhat confirms my theory that we'll most likely see Captain America frozen at the end of the first movie and unthawed and revived somehow in the actual Avengers movie."