IPA: /ˈdɛstɪtjuːt/
KK: /ˈdɛstəˌtut/
Completely without money, food, or other basic necessities; extremely poor.
After losing his job, he found himself destitute and living on the streets.
Destitute is formed from "destitutus" (meaning abandoned or forsaken) which comes from the Latin root "destituere" (meaning to set down or abandon). The word describes a state of being abandoned or lacking the basic necessities of life.
Think of someone who has been 'abandoned' ('destitutus') and is without the essentials needed to live.