"exalted sensation," 1835, from Modern Latin (1783), from hyper- "over, exceedingly, to excess" + Greek aisthēsis "feeling" (from PIE root *au- "to perceive") + abstract noun ending -ia. Related: Hyperaesthetic.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit avih, Avestan avish "openly, evidently;" Greek aisthanesthai "to feel;" Latin audire "to hear;" Old Church Slavonic javiti "to reveal."
word-forming element in names of countries, diseases, and flowers, from Latin and Greek -ia, noun ending, in Greek especially used in forming abstract nouns (typically of feminine gender); see -a (1). The classical suffix in its usual evolution (via French -ie) comes to Modern English as -y (as in familia/family, also -logy, -graphy). Compare -cy.
In paraphernalia, Mammalia, regalia, etc. it represents Latin or Greek -a (see -a (2)), plural suffix of nouns in -ium (Latin) or -ion (Greek), with formative or euphonic -i-.
<a href="https://www.etymonline.com/word/hyperaesthesia">Etymology of hyperaesthesia by etymonline</a>
Harper, D. (n.d.). Etymology of hyperaesthesia. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/hyperaesthesia