IPA: /ʌnˈæktəbl/
KK: /ʌnˈæktəbl/
Not able to be acted or performed; not suitable for acting.
The script was deemed unactable due to its complex and confusing plot.
Unactable → It is formed from "un-" (meaning not) and "act" (from Latin "agere", meaning to do or perform) and "-able" (meaning capable of). The word "unactable" means not capable of being acted or performed.
Think of 'not' ('un-') being able to 'do' something ('act') — that's why unactable means something that cannot be performed.