dreadnought n.

late 12c., "to fear very much, be in shrinking apprehension or expectation of," a shortening of Old English adrædan, contraction of ondrædan "counsel or advise against," also "to dread, fear, be afraid," from ond-, and- "against" (the same first element in answer, from PIE root *ant-) + rædan "to advise" (from PIE root *re- "to reason, count"). Cognate of Old Saxon andradon, Old High German intraten. Related: Dreaded; dreading.

As a noun from c. 1200, "great fear or apprehension; cause or object of apprehension." As a past-participle adjective (from the former strong past participle), "dreaded, frightful," c.1400; later "held in awe" (early 15c.).

Middle English, from Old English nowiht "nothing," variant of nawiht (see naught). Meaning "zero, cipher" is from early 15c. Expression for nought "in vain" is from c. 1200. To come to nought is from early 15c. (become to naught, ycome to naught are from c. 1300).

1794, "recklessly daring person, one who fears nothing and will attempt anything," from dare (v.) + devil (n.). The devil might refer to the person, or the sense might be "one who dares the devil." For the formation, compare scarecrow, killjoy, dreadnought, pickpocket (n.), cut-throat, also fear-babe a 16c. word for "something that frightens children;" kill-devil "bad rum," sell-soul "one who sells his soul" (1670s).

As an adjective, "characteristic of a daredevil, reckless," by 1832. Related: Daredevilism; daredeviltry.