It’s the same as to be unraveled. You can be frozen, thawed, and then unthawed, which I think means frozen again. Do, or do not. Thaw, or unthaw. Try, or untry. There is no grammar.
Unthaw that frozen lamb so’s that we can barbecue it for dinner. While you’re at it, unravel that skein of yarn so that I can knit your grandfather a new iPhone cozy to keep it warm while it’s unplugged in and not uncharging.
An aside: Neologisms with active device autocorrect are remarkably painful on an iPhone. A new death shall pee upon us.
Raveled is to thaw as unthaw is to unraveled. Stop saying unravel when you mean ravel, and stop saying unthaw when you mean thaw.
Oh my JFC! Jesus. Forever. Christ. Someone left the door to the freezer in the basement open! Hopefully, my murder victims didn’t unthaw and unravel the ropes; if they did, nothing has changed. The police will never unsee not a nothing.
Please disregard the serial killer implications. I am a grammar Nazi, not an actual Nazi. Or, am not I? I was once a thing, but now the thing is me, and I am a thing no more.
—DG
Inside Doug's Head 