able anonymous cryptonymic cryptonymous enigmatic incalculable incognito incognizable innominate mysterious nameless puzzling sealed strange unacknowledged unapparent unapprehended unascertained unbeknown uncharted unclassified undefined undesignated undisclosed undiscoverable undiscovered undivulged unexplained unexplored unexposed unfamiliar unfathomed unheard unheard-of uninvestigated unknowable unknown unmarked unnamed unperceived unplumbed unrecognized unrevealed unspecified unsuspected untouched virgin without a name