haecceity

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the essence that makes something the kind of thing it is and makes it different from any other
• Syn:
quiddity
• Hypernyms:
kernel, substance, core, center, centre,
essence, gist, heart, heart and soul, inwardness, marrow,
meat, nub, pith, sum, nitty-gritty