able all-comprehensive all-inclusive boundless countless endless enigmatic eternal exhaustless extending everywhere illimitable illimited immeasurable immense incalculable incognizable incomprehensible inexhaustible infinite infinitely continuous innumerable interminable interminate limitless measureless mysterious no end of perpetual puzzling sealed shoreless strange sumless termless unapparent unapprehended unascertained unbeknown unbounded uncharted uncircumscribed unclassified undisclosed undiscoverable undiscovered undivulged unexplained unexplored unexposed unfamiliar unfathomable unfathomed unheard unheard-of unidentified uninvestigated universal unknowable unknown unlimited unmeasurable unmeasured unnumbered unperceived unrevealed unsuspected untold untouched virgin without bound without end without limit without measure without number