say it: FAY-ling
failing is a noun and adjective meaning "a flaw or weak point". It carries 3 recorded senses.
a flaw or weak point
“he was quick to point out his wife's failings”
failure to reach a minimum required performance
“his failing the course led to his disqualification”
“he got two flunks on his report”
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 failing 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.