I₁N₁S₁I₁D₂I₁O₁U₁S₁

10 points

INSIDIOUS is validvalid

[adj] : INSIDIOUSLY [adv], INSIDIOUSNESS [n]

102,660 of 196,601 in NWL2023·also valid in CSW24

developing or advancing gradually and imperceptibly [adj INSIDIOUSLY]

121,414 of 280,887 in CSW24·also valid in NWL2023