IPA: /ʌnˈʃeɪpən/
KK: /ʌnˈʃeɪpən/
Not having a definite or regular shape; lacking form or structure.
The artist preferred to work with unshapen clay to create unique sculptures.
Unshapen → It is formed from "un-" (meaning not) and "shapen" (from Old English "sceapen", meaning to shape or form). The word "unshapen" means not shaped or lacking a defined form.
Think of 'not' ('un-') having a 'shape' ('shapen') — that's why unshapen means lacking a defined shape.