As an adjective finicky
is (informal) fastidious and fussy; difficult to please; exacting, especially about details.
As an adverb finickily is
in a finicky way.
(informal) Fastidious and fussy; difficult to please; exacting, especially about details.
(informal) Demanding, requiring above-normal care.
- ''The baby was finicky until her diaper was changed.
- The lawnmower is a bit finicky in cold weather.
* The forms (finickier) and (finickiest) also exist, but are quite rare, and perhaps nonstandard. The forms (term) and (term) are much more common, and certainly standard.
* fastidious, fussy