Definition of trustworthiness noun from the Oxford Advanced Learner's Dictionary

 

trustworthiness

 noun
noun
BrE BrE//ˈtrʌstwɜːðinəs//
 
; NAmE NAmE//ˈtrʌstwɜːrðinəs//
 
[uncountable]
 
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the quality of always being good, honest, sincere, etc. so that people can rely on you synonym reliability (1) It was a chance to prove his trustworthiness to them.