Origin and history of nearly

Old English near "closer, nearer," comparative of neah, neh "nigh." Partially by the influence of Old Norse naer "near," it came to be used in English as a positive form mid-13c., and new comparative nearer developed in the 1500s (see nigh). Originally an adverb but now supplanted in most such senses by nearly; it has in turn supplanted correct nigh as an adjective.

The adjectival use dates from c. 1300, "being close by, not distant;" from late 14c. as "closely related by kinship;" 1610s as "economical, parsimonious." Colloquial use for "so as to barely escape injury or danger" (as in a near thing, near miss) is by 1751. As a preposition, "close to, close by, near in space or time," from mid-13c. Related: Nearness. In near and dear (1620s) it refers to nearness of kinship. Near East is by 1894 (probably based on Far East). Near beer "low-alcoholic brew" is from 1908.

common adverbial suffix, forming, from adjectives, adverbs signifying "in a manner denoted by" the adjective; Middle English -li, from Old English -lice, from Proto-Germanic *-liko- (source also of Old Frisian -like, Old Saxon -liko, Dutch -lijk, Old High German -licho, German -lich, Old Norse -liga, Gothic -leiko). See -ly (1). It is cognate with lich, and identical with like (adj.).

Weekley notes as "curious" that Germanic uses a word essentially meaning "body" for the adverbial formation, while Romanic uses one meaning "mind" (as in French constamment from Latin constanti mente). The modern English form emerged in late Middle English, probably from influence of Old Norse -liga.