The word "sustenance" refers to the food and nourishment that is necessary for someone's survival or the survival of living organisms. It means the things we need to eat or consume to keep healthy and alive. Full definition
The governor called on the people of the state to imbibe spirit of tolerance and harmonious relationship for sustenance of growth and economic development in the state. (nigeriapoliticsonline.com)
Everyone else will probably experience a gag reflex when such an overload of cotton candy sweetness would be your only source for sustenance for the almost two hour duration. (qwipster.net)
The deal, loosely defined, was that I would supply all the food and other forms of sustenance in exchange for his help. (edutopia.org)