doubtful

epäilyttävä, arveluttava

epävarma Subject to, or causing doubt.
experienceVerb Experiencing or showing doubt, sceptical.
undecided Undecided or of uncertain outcome.
puhekieltä fearsome Fearsome, dreadful.
(RQ:Mlry MrtArthr), Bk.XIV, Ch.vii:

‘With whom,’ seyde Sir Percivale, ‘shall I fyght?’ ‘With the moste douteful champion of the worlde(nb..).’

They had their lists of Liberals and of the doubtfuls who still remained doubtful. As the election drew near, the force of the whole organization was turned upon these unrepentant doubtfuls.