irresponsibleness
ir·res·pon·sibleness
noun
1.
a form of untrustworthiness; the trait of lacking a sense of responsibility and not feeling accountable for your actions
Origin
From irresponsible + -ness.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.