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語源

From Latin egens, egentis, present participle of egere (“to be needy, suffer want”).

名詞

egence (countable かつ uncountable, 複数形 egences)

1. The state of needing, or of suffering a natural want.
   • 1876, John Grote, Treatise on Moral Ideals

     Egence is the life of the universe : the highest forms of egence are variously called ' love ' : the lowest are simple appetence , perhaps merely physical .

参照

egence in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.