"upkeep" in the noun sense
1. care, maintenance, upkeep
activity involved in maintaining something in good working order
"he wrote the manual on car care"
2. sustenance, sustentation, sustainment, maintenance, upkeep
the act of sustaining life by food or providing a means of subsistence
"they were in want of sustenance"
"fishing was their main sustainment"
Source: WordNet® (An amazing lexical database of English)
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