1
hardheaded
1
impenetrable
1
impossible
1
jumpy
1
killer
1
more difficult
1
nervy
1
opaque(adjective, hard)
1
painstaking(adjective, thorough, meticulous)
1
particular
1
persnickety
1
perturbed
1
poor
1
precarious
1
restrictive
1
rigid
1
rocky
1
ruthless(calm, gentle, merciful)
1
serious
1
sheer
10 years ago|10k views|share |citing 
APASmart Define. (2016). easy thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/easy/thesaurus/antonyms
ChicagoSmart Define. 2016. "easy thesaurus" https://smartdefine.org/easy/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, easy thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/easy/thesaurus/antonyms>.
MLASmart Define. "easy thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/easy/thesaurus/antonyms>