IPA: /ˈrɛskjuːi/
KK: /ˈrɛsˌkjuːi/
A person who has been saved from danger or harm.
The rescuee was grateful to the firefighters for saving her from the burning building.
Rescuee is formed from "rescue" (from Old French *rescour*, meaning to save or recover) and the suffix "-ee" (meaning a person who is the recipient of an action). The word "rescuee" refers to a person who has been saved or rescued from danger.
Think of someone who has been 'saved' ('rescue') and the '-ee' indicates that this person is the one receiving that action.