a combining form meaning “ill,” “bad,” used in the formation of compound words:
diseased, abnormal, or faulty: dysentery, dyslexia
difficult or painful: dysuria
unfavourable or bad: dyslogistic
word-forming element meaning “bad, ill, abnormal,” from Greek dys-, inseparable prefix “destroying the good sense of a word or increasing its bad sense” [Liddell and Scott], “bad, hard, unlucky,” from PIE root (and prefix) *dus- “bad, ill, evil” (cf. Sanskrit dus-, Old Persian duš- “ill,” Old English to-, Old High German zur-, Gothic tuz- “un-“), a derivative of *deu- “to lack, be wanting” (cf. Greek dein “to lack, want”).
Very productive in ancient Greek, where it could attach even to proper names (e.g. dysparis “unhappy Paris”); its entries take up nine columns in Liddell and Scott. Among the words formed from it were some English might covet: dysouristos “fatally favorable, driven by a too-favorable wind;” dysadelphos “unhappy in one’s brothers;” dysagres “unlucky in fishing;” dysantiblepos “hard to look in the face.”
Digital Simulated Analog Computer. [Sammet 1969, p. 629].
[dis-uh-koo-zhuh, -zhee-uh, -zee-uh] /ˌdɪs əˈku ʒə, -ʒi ə, -zi ə/ noun, Pathology. 1. a condition in which noise produces pain in the ear. dysacousia dys·a·cou·si·a or dys·a·cu·si·a (dĭs’ə-kōō’zē-ə, -zhə, -kyōō’-) n. A condition in which ordinary sounds produce discomfort or pain in the ear.
dysacusis dys·a·cu·sis (dĭs’ə-kōō’sĭs) n.
[dis-ad-uh p-tey-shuh n] /dɪsˌæd əpˈteɪ ʃən/ noun, Ophthalmology. 1. faulty of the iris and retina to light.