say it: SUH-stuh-nuhns
sustenance is a noun meaning "a source of materials to nourish the body". It carries 3 recorded senses.
a source of materials to nourish the body
the financial means whereby one lives
“each child was expected to pay for their keep”
“he applied to the state for support”
“he could no longer earn his own livelihood”
the act of sustaining life by food or providing a means of subsistence
“they were in want of sustenance”
“fishing was their main sustainment”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for sustenance come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.