n.: suspiciousness, disbelief, umbrage, unbelief, shake one's head, in doubt, take sth.with a grain[pinch]of salt, with a grain of salt, a shake of one's [the] head, have a suspicion of [that], be [fell] suspicious of [about], scepsis, uncertainty or disbelief, feeling of doubt, qualm, feeling of doubt, esp about whether what one is doing is right, suspecting or being suspected, scepticism, discredit, query, misgiving, incredulity, doubt, dubiosity, dubiety