say it: di-SAHY-siv-nuhs
decisiveness is a noun meaning "the trait of resoluteness as evidenced by firmness of character or purpose". It carries 2 recorded senses.
the trait of resoluteness as evidenced by firmness of character or purpose
“a man of unusual decisiveness”
the quality of being final or definitely settled
“the finality of death”
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 decisiveness 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.