Inexplicable (10)
'inexplicable' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for mysterious that I've seen before include "Enigmatic, baffling" , "Secret" , "Strange" , "Inexplicable" , "Beyond normal understanding" .)
'inexplicable' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for unaccountable that I've seen before include "Unable to be explained" , "Not explicable" , "That cannot be explained" .)