1. the quality of being reliable; dependability or trustworthiness
Usage: formal; less common than ‘reliability’

Examples

• The reliableness of the old car impressed everyone who drove it.
• Her reliableness as a friend made her someone people could count on.
• The company’s reliableness in delivering products on time built customer loyalty.
• We questioned the reliableness of the weather forecast after three wrong predictions.
• The reliableness of the data was crucial for the research study.
• His reliableness at work earned him a promotion to supervisor.