dudoso
, a
1
(=incierto)
[diagnóstico, futuro] doubtful, uncertain
[resultado] indecisive
de origen dudoso of doubtful o uncertain origin
aún es dudosa su colaboración it's still uncertain whether he will collaborate, his collaboration is still uncertain
2
(=vacilante)
[persona] hesitant
estar dudoso to be undecided, be in two minds
3
(=sospechoso)
[actuación, dinero, reputación] dubious
el empleo de tácticas dudosas the use of suspect o dubious tactics
b sm/f
el voto de los dudosos the "undecided" vote
Translation Spanish - English Collins Dictionary  

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"Collins Spanish Dictionary 8th edition published in 2005 © William Collins Sons & Co Ltd 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005"