英语词源字典 - 在线词源网站

nicely (adv.)[nicely 词源字典]: early 14c., "foolishly," from nice + -ly (2). From c. 1600 as "scrupulously;" 1714 as "in an agreeable fashion."[nicely etymology, nicely origin, 英语词源]
religiously (adv.): late 14c., "in a religous manner," from religious + -ly (2). Transferred sense of "strictly, scrupulously" attested by 1570s.
scrupulous (adj.): mid-15c., from Anglo-French scrupulus, Middle French scrupuleux, or directly from Latin scrupulosus, from scrupulus (see scruple). Related: Scrupulously; scrupulousness.
unscrupulous (adj.): 1803, from un- (1) "not" + scrupulous (adj.). Related: Unscrupulously; unscrupulousness.