not noticed inadvertently

something unspecified whose name is either forgotten or not known

blviən/ noun 1. the fact of be-ing completely forgotten  After being fa-mous during the war the town fell into

An undetermined or unspecified thing, An uncertain or unspecified thing; one thing, One having some or many of the same attributes, character, or essence as another, noun_ A remarkable or important thing or person, An actual thing; an entity_ as, something or nothing, An actual thing; an entity_ as, something or nothing, verb_ Applied to an action whose name is forgotten by, unknown or unimportant to the user, e.g. from words of a song, adverb_ A little; somewhat, Informal To an extreme degree, In some degree; somewhat; to some extent; at some distance, verb_ Applied to an action whose name is forgotten by, unknown or unimportant to the user, e.g. from words of a song, adjective_ Of, relating to, or being a member of a specified age range. Often used in combination, Having a characteristic that the speaker cannot specify