IPA: /nɒn.dɪˈlɪb.ər.ət/
KK: /nɑnˈdɛlɪbərɪt/
Something that is not done on purpose or intentionally; it happens by accident or without planning.
The mistake was nondeliberate, and no one was upset about it.
Nondeliberate → It is formed from "non-" (meaning not) and "deliberate" (from Latin "deliberatus", meaning considered or weighed). The word "nondeliberate" means not considered or not done with careful thought.
Think of 'non-' meaning not, and 'deliberate' meaning to consider carefully — so nondeliberate refers to actions that are not carefully thought out.