Source : Webster's Revised Unabridged Dictionary (1913)

Mistily \Mist"i*ly\, adv.
   With mist; darkly; obscurely.

Source : WordNet®

mistily
     adv 1: in a misty manner; "the summits of the mountains were
            mistily purple"
     2: in a vague way; "he looked vaguely familiar"; "he explained
        it somewhat mistily" [syn: {vaguely}]