dudar
transitive verb
1 (no estar seguro de) to doubt
espero que venga, aunque lo dudo mucho I hope she'll come, although I doubt very much (if) she will; —yo te ayudaré —no lo dudo, pero ... "I'll help you" — "I'm sure you will, but ..."; es lo mejor para ti, no lo dudes it's the best thing for you, believe me
a no dudarlo undoubtedly
dudar que
dudo que sea verdad I doubt (whether o if) it's true
dudo que yo haya dicho eso I doubt I said that; no dudo que sea capaz de hacerlo I don't doubt that he's capable of doing it
dudar si
dudaba si había echado la carta I wasn't sure if I had posted the letter
intransitive verb
1 (desconfiar) to doubt; have doubts
dudar de algo to question sth; doubt sth
los celos le hicieron dudar de su cariño jealousy made her question o doubt his affection
2 (vacilar)
no sé qué hacer, estoy dudando I don't know what to do, I'm in two minds o I'm undecided; dudamos entre ir en autobús o en taxi we were not sure whether to go by bus or taxi; dudaba entre los dos she couldn't decide between the two
dudar en hacer algo to hesitate to do sth
dudaba en comprarlo he hesitated to buy it; no dudes en llamarme don't hesitate to call me