From WordNet (r) 3.0 (2006):
distrust
n 1: doubt about someone's honesty [syn: misgiving,
mistrust, distrust, suspicion]
2: the trait of not trusting others [syn: distrust,
distrustfulness, mistrust] [ant: trust, trustfulness,
trustingness]
v 1: regard as untrustworthy; regard with suspicion; have no
faith or confidence in [syn: distrust, mistrust,
suspect] [ant: bank, rely, swear, trust]