[1] : The Collaborative International Dictionary of English v.0.48

mistrustful \mistrust"ful\, a.
   having or causing mistrust, suspicions, or forebodings.
   1913 webster

         their light blown out in some mistrustful wood. --shak.
   1913 webster -- mistrust"fully, adv. --
   mistrust"fulness, n.
   1913 webster
see also:
mistrust"fully mistrust"fulness 

[2] : WordNet (r) 2.0

mistrustful
     adj : openly distrustful and unwilling to confide syn: leery, suspicious,
            untrusting, wary
see also:
leery suspicious untrusting wary 

[3] : Moby Thesaurus II by Grady Ward, 1.0

21 moby thesaurus words for "mistrustful":
   pyrrhonic, agnostic, cagey, chary, distrustful, doubtful, doubting,
   dubious, from missouri, in doubt, leery, mistrusting, questioning,
   scrupulous, shy, skeptical, suspecting, suspicious, uncertain,
   untrusting, wary

Mistrustful >> M Words
Mistrustful, definition of term: Mistrustful
mistrustful_pag1.html