1
immature
1
immune
1
inconstant
1
innocent
1
traitorous
1
unfaithful
1
derelict
1
devil-may-care
1
do-nothing
1
dodgy
1
false
1
fickle
1
fishy
1
flighty(adjective, fickle, irresponsible)
1
fly-by-night(adjective, unreliable, shady)
1
foolish(adjective, sound, wise)
1
free
1
freewheeling
1
happy-go-lucky
1
harum-scarum
11 years ago|4.4k views|share |citing 
APASmart Define. (2015). responsible thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/responsible/thesaurus/antonyms
ChicagoSmart Define. 2015. "responsible thesaurus" https://smartdefine.org/responsible/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2015, responsible thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/responsible/thesaurus/antonyms>.
MLASmart Define. "responsible thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/responsible/thesaurus/antonyms>