List of unexplained synonyms and unexplained related words.
able, enigmatic, incalculable, incognizable, invisible, mysterious, puzzling, sealed, strange, unapparent, unapprehended, unascertained, unbeknown, uncharted, unclassified, undetected, undisclosed, undiscoverable, undiscovered, undivulged, unexplored, unexposed, unfamiliar, unfathomed, unheard, unheard-of, unidentified, uninvestigated, unknowable, unknown, unperceived, unplumbed, unrevealed, unseen, unsolved, unspied, unsuspected, untouched, untraced, untracked, virgin