say it: ree-MIS
remiss is an adjective meaning "failing in what duty requires". It is pronounced /ɹiˈmɪs/ — ree-MIS. It carries one recorded sense.
failing in what duty requires
“derelict (or delinquent) in his duty”
“neglectful of his duties”
“remiss of you not to pay your bills”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for remiss come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.