sustenance

(noun) a source of materials to nourish the body. Synonyms: nutriment, nourishment, nutrition, aliment, alimentation, victuals.

(noun) the financial means whereby one lives. Synonyms: support, keep, livelihood, living, bread and butter. Examples: "Each child was expected to pay for their keep." "He applied to the state for support." "He could no longer earn his own livelihood."

(noun) the act of sustaining life by food or providing a means of subsistence. Synonyms: sustentation, sustainment, maintenance, upkeep. Examples: "They were in want of sustenance." "Fishing was their main sustainment."