IPA: //haɪpəˈrɛsθɪk//
KK: /haɪˌpɛrəˈɛsθɪk/
Having an increased sensitivity to sensory stimuli, such as touch, sound, or light.
After the accident, she became hyperaesthetic and found even soft sounds overwhelming.
Hyperaesthetic is formed from "hyper-" (meaning over or excessive) and "aesthetic" (from Greek "aisthesis", meaning sensation or perception). The word describes a condition of having an excessive sensitivity to sensory stimuli.
Think of 'hyper-' meaning 'over' or 'excessive' and 'aesthetic' relating to 'sensation' — this helps you remember that hyperaesthetic refers to having an excessive sensitivity to sensations.