Synonyms of remiss in English:

remiss


See definition of remiss

adjective

1‘I can see that I have been very remiss’

SYNONYMS
negligent, neglectful, irresponsible, careless, thoughtless, heedless, unthinking, unmindful, lax, slack, slipshod, lackadaisical, forgetful, inattentive, unheeding
lazy, dilatory, indolent
North American derelict
informal sloppy
formal delinquent
barratrous
archaic disregardful, oscitant
ANTONYMS

careful, diligent, painstaking