early 14c., niceli, "foolishly," from nice (q.v.) + -ly (2). In Middle English also "foolishly; stupidly; extravagantly; wickedly." From c. 1600 as "scrupulously;" 1714 as "in an agreeable fashion."
a nicely painted house
niblick
nibs
Nicaragua
Nice
nice
nicely
Nicene
niceness
nicety
niche
Nicholas