Not keeping good faith; disloyal; not faithful.
Not honest or upright.
Negligent or imperfect.
Not faithfully rendering the meaning of the source language; incorrect.
Not having religious faith.
Adulterous.
Of a belief, state of mind, etc.: not favourable; disapproving.
Of wind or weather: causing delay or obstacles; not conducive to travel or work; inclement.
Serving to hinder or oppose; adverse, disadvantageous, inconducive, unsuitable.
Not auspicious; ill-boding.