IPA: /ɪˈmɛdɪkəbl/
KK: /ɪˈmɛdɪkəbl/
Something that cannot be cured or healed.
The disease was deemed immedicable, leaving the doctors with no treatment options.
Immedicable is formed from "in-" (meaning not) and "medicabilis" (from Latin "medicabilis", meaning curable or treatable). The word describes a condition that is not curable or treatable.
Think of 'not' ('in-') being combined with 'curable' ('medicabilis') to remember that 'immedicable' means something that cannot be cured.