Looking up these two words ("to trap" vs "to entrap") I came across the same definition, namely, "to catch as in a trap". So is there no difference between them? Surely, the prefix must add some kind of nuance to it, otherwise there'd be no point. Can somebody tell me what it is, please?
"Entrap" is usually used to state that by using unfair methods someone has been persuaded to do something they would not usually do. A common usage is when a law enforcement officer/agency has deceived someone into committing a crime in order to secure his/her/their prosecution for that crime. It is not well regarded as a general rule.