Unaccountable/ˌʌnəˈkaʊntəbl/ Definition 1 of 2Pro Tip 1/3Mystery Contexts Use 'unaccountable' to describe strange events or phenomena that have no logical explanation. Their sudden disappearance was completely unaccountable. Pro Tip 2/3Supernatural Associations Often used in contexts with supernatural, eerie, or otherworldly undertones. She had an unaccountable feeling of being watched. Pro Tip 3/3Unexpected Occurrences Employ when unexpected or random events occur without a clear cause. An unaccountable surge of electricity caused the lights to flicker.