a. 不真实的, 假的, 不诚实的

[ adj ]
not expressing or given to expressing the truth
<adj.all>
the statement given under oath was untruthfulan untruthful person

Untruthful \Un*truth"ful\, a.
Not truthful; unveracious; contrary to the truth or the fact.
-- {Un*truth"ful*ly}, adv. -- {Un*truth"ful*ness}, n.