malformed

Something malformed has a shape that's twisted or warped, or otherwise distorted. Your first try at making pottery might result in a couple of malformed bowls.

If you leave a doll in the hot sunlight for hours, she may melt and become malformed. Sometimes parts of the body are malformed because of birth defects or accidents. If you're born with a malformed spine, you may wear a brace to straighten it out. If your feet are malformed, your choice of shoes will be limited. Malformed combines the prefix mal-, "badly or wrongly," with formed, from the Latin forma, "shape or appearance."

Definitions of malformed
1

adj so badly formed or out of shape as to be ugly

“a limp caused by a malformed foot”
Synonyms:
deformed, distorted, ill-shapen, misshapen
unshapely
not well-proportioned and pleasing in shape

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