Antonyms of adj fastidious

2 senses of fastidious

Sense 1
fastidious (vs. unfastidious) -- (giving careful attention to detail; hard to please; excessively concerned with cleanliness; "a fastidious and incisive intellect"; "fastidious about personal cleanliness")

unfastidious (vs. fastidious) -- (marked by an absence of due or proper care or attention to detail; not concerned with cleanliness; "unfastidious in her dress")

Sense 2
fastidious (vs. unfastidious), exacting -- (having complicated nutritional requirements; especially growing only in special artificial cultures; "fastidious microorganisms"; "certain highly specialized xerophytes are extremely exacting in their requirements")

unfastidious (vs. fastidious) -- (not exacting in nutritional requirements)

Similarity of adj fastidious

2 senses of fastidious

Sense 1
fastidious (vs. unfastidious) -- (giving careful attention to detail; hard to please; excessively concerned with cleanliness; "a fastidious and incisive intellect"; "fastidious about personal cleanliness")
       => choosy, choosey -- (difficult to please)
       => dainty, nice, overnice, prissy, squeamish -- (excessively fastidious and easily disgusted; "too nice about his food to take to camp cooking"; "so squeamish he would only touch the toilet handle with his elbow")
       => finical, finicky, fussy, particular, picky -- (exacting especially about details; "a finicky eater"; "fussy about clothes"; "very particular about how her food was prepared")
       => meticulous -- (marked by extreme care in treatment of details; "a meticulous craftsman"; "almost worryingly meticulous in his business formalities")
       => pernickety, persnickety -- (characterized by excessive precision and attention to trivial details; "a persnickety job"; "a persnickety school teacher")
       => old-maidish, old-womanish -- (primly fastidious)
          Also See-> refined#1; tidy#1

Sense 2
fastidious (vs. unfastidious), exacting -- (having complicated nutritional requirements; especially growing only in special artificial cultures; "fastidious microorganisms"; "certain highly specialized xerophytes are extremely exacting in their requirements")