[ahyuh r] /aɪər/
intense anger; wrath.
(literary) anger; wrath
c.1300, from Old French ire “anger, wrath, violence” (11c.), from Latin ira “anger, wrath, rage, passion,” from PIE root *eis-, forming various words denoting “passion” cf. Greek hieros “filled with the divine, holy,” oistros “gadfly,” originally “thing causing madness;” Sanskrit esati “drives on,” yasati “boils;” Avestan aesma “anger”).
Old English irre in a similar sense is from an adjective irre “wandering, straying, angry,” cognate with Old Saxon irri “angry,” Old High German irri “wandering, deranged,” also “angry;” Gothic airzeis “astray,” and Latin errare “wander, go astray, angry” (see err (v.)).
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/ˈaɪətən/ noun 1. Henry. 1611–51, English Parliamentarian general in the Civil War; son-in-law of Oliver Cromwell. His plan for a constitutional monarchy was rejected by Charles I (1647), whose death warrant he signed; lord deputy of Ireland (1650–51)
[ahy-ahr] /ˈaɪˈɑr/ noun, Immunology. 1. a gene controlling the magnitude of the immune response to a particular antigen.