a. [f. STARTLE v. + -ISH.] Easily startled; apt to take fright; esp. said of a horse. Hence Startlishness.

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1740.  Dyche & Pardon, Dict. (ed. 3), Startlish [ed. 1735 Startish] or Startly.

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1807.  Southey, Espriella’s Lett. (1814), II. 273. Both were spirited beasts…;—both were startlish, and the mare vicious. Ibid., III. 339. All night I remained wakeful—not in that state of feverish startlishness which the expectation of an early call occasions, but [etc.].

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1836.  Blackw. Mag., XL. 618. The cab-horse had exhibited symptoms of startlishness.

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1863.  Mrs. H. Wood, Verner’s Pride, II. xiii. 169. The sudden entrance startled her, albeit she was not of a startlish temperament.

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