The qualities, properties or characteristics of a thing which make it a particular thing.(noun)
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Use "thisness" in a sentence
"Other times they're constructed to isolate a telling detail that creates what Wood calls thisness, which he defines as "any detail that draws abstraction toward itself and seems to kill that abstraction with a puff of palpability.""
"Would the quintessential "thisness" of each of us disappear if a new person is created?"
"The Spirit, meanwhile, both provides creatures with their "thisness," or particularity as unique individuals, and lures them onward toward new possibilities of fulfillment and self-transcendence."