haecceity
noun
haec·ce·i·ty
variants or hecceity
-ətē
plural -es
: the status of being an individual or a particular nature : individuality, specificity, thisness
specifically : what makes something to be an ultimate reality different from any other compare quiddity sense 2
Word History
Etymology
Medieval Latin haecceitas, from Latin haec, haecce, feminine of hic, hicce this + -itas -ity