Learn English – What do you call someone who gives you the wrong advice

single-word-requests

I have a co-worker at work who I have figured has given me the wrong advice or wrong impression more than once (like "oh its ok to come by this time" while I found out later it was not permitted by company policy).

What do you call such a person?

EDIT:
Thanks to everyone for the answers. I was looking for someone doing this deliberately.In my opinion the word I would use would be a "deceiver" or a "misleader", as they convey the sense of deliberately giving a false impression or leading in the wrong direction.

Best Answer

There are several possible answers;

If this behavior is intentional - they may be a "saboteur" (one who sabotages), they may be "deceitful" (deceiving or misleading others), "suborning" (inducing (someone) to commit an unlawful act) or "malicious" (intending or intended to do harm).

If it is unintentional - then they are "mistaken" (wrong in one's opinion or judgment), "incorrect" (not in accordance with fact; wrong) or possibly "out-of-date" (no longer useful or acceptable) or even "out of touch" (not keeping informed of the developments relating to someone or something).

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