inscrutable (adj) - difficult or impossible to comprehend or interpret
BREAKDOWN: IN- (not) + SCRUT- (examine) + -ABLE (able to be)
inscrutability is the state of being inscrutable (also inscrutableness)
to scrutinize means to examine with great care
“This world, after all our science and sciences, is still a miracle; wonderful, inscrutable, magical and more, to whosoever will think of it.” —Thomas Dekker