M3Y4S1T1E1R1I1O1U1S1
15 points
MYSTERIOUS is validvalid
[adj] : MYSTERIOUSLY [adv], MYSTERIOUSNESS [n]
of, relating to, or constituting mystery [adj MYSTERIOUSLY]
[adj] : MYSTERIOUSLY [adv], MYSTERIOUSNESS [n]
of, relating to, or constituting mystery [adj MYSTERIOUSLY]