IPA: /nɒnˈriːtræktaɪl/
KK: /nɑnˈriːtræktaɪl/
This word describes something that cannot be drawn back or retracted.
The nonretractile claws of the animal help it grip surfaces firmly.
Nonretractile → It is formed from "non-" (meaning not), "retract" (from Latin "retractare", meaning to draw back), and "-ile" (meaning capable of). The word "nonretractile" means not capable of being drawn back or retracted.
Think of 'not' ('non-') being able to 'draw back' ('retract') — that's why nonretractile means something that cannot be drawn back.