IPA: /ˈmɔːrtəli/
KK: /ˈmɔrtəli/
In a way that relates to death or is fatal; extremely or seriously.
He was mortally wounded in the battle and did not survive.
Mortally → It is formed from "mors" (meaning death) and the suffix "-ally" (meaning in a manner relating to). The word "mortally" refers to something that relates to death or is fatal.
Think of 'mors' which means death, and remember that 'mortally' describes something that relates to death.