sustentation (n.) Look up sustentation at Dictionary.com
late 14c., from Anglo-French, Old French sustentacion, sostentacion "sustaining of life," from Latin sustentationem (nominative sustentatio) "maintenance," noun of action from past participle stem of sustentare "hold upright, hold up; feed, nourish, support; hold out, endure, suffer," frequentative of sustinere (see sustain).