mis- 1
a prefix applied to various parts of speech, meaning "ill," "mistaken," "wrong," "wrongly," "incorrectly," or simply negating: mistrial; misprint; mistrust.
[ ME; OE mis ( se )-; c. G miss-, Goth missa- (see MISS 1 ;); often r. ME mes- mis ( s )- ]
mis- 2
var. of miso- before some vowels: misanthrope.