say it: flaw
flaw is a noun and verb meaning "an imperfection in an object or machine". It carries 4 recorded senses.
defect or weakness in a person's character
“he had his flaws, but he was great nonetheless”
an imperfection in a plan or theory or legal document that causes it to fail or that reduces its effectiveness
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 flaw 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.