Q: criminals felt emboldend to regulary engage in criminal activity.
And, gripped by fear とはどういう意味ですか?
A: embolden = give courage and confidence to do something. As the police were focusing on the serious offenders, the minor criminals felt that they were not being watched as much, and thought that they could get away with small crimes.

gripped by fear = strongly affected by, or tormented by fear

Hope this helps!
Q: The dumbest criminals on earth is the one who holds up a group of tourists on their way home from Las Vegas. とはどういう意味ですか?
A: It's a joke that everyone who leaves Vegas has lost all their money gambling. So if you try to rob them, they have no money left to steal.
Q: hardened criminals とはどういう意味ですか?
A: People who commit crimes on a regular basis


Q: criminal を使った例文を教えて下さい。
A: The criminal escaped from prison.

If you kill someone, you would become a criminal.


Q: criminal と criminous はどう違いますか?
A: A criminal is a person, criminous would describe someone actions. For example, that person committed a criminous act. Meaning it was an act against the law.
Q: criminals と offenders はどう違いますか?
A: Criminals are much more serious than offenders

For more serious crimes such as drug trafficking, rape or murder, one could be called Criminal.

For not so serious infringements of regulations or rules, one could be called offender.
Q: associate with ex) I don't associate with criminals like him と associate oneself with ex) I think he is happy to associate himself with successful people like us はどう違いますか?
A: not really. the only difference is that in the second sentence you added the word “himself” between associate and with; this further clarified that he associates himself with successful people. so no, there really isn’t a difference
Q: criminal と culprit はどう違いますか?
A: criminal is someone who committed a crime and culprit is someone who is accused of a crime!!
Q: criminal と culprit はどう違いますか?
A: Culprit can be used in this way:

Someone played a prank on me, do you know who's the culprit?

Culprit can be used in a lot of situations. Hope that helps!


Q: criminal は 英語 (アメリカ) で何と言いますか?
Q: criminal は 英語 (アメリカ) で何と言いますか?
A: QAの全文をご確認ください
Q: the criminals who tell lie. は 英語 (アメリカ) で何と言いますか?
A: correcting your sentance would be:
the criminals who tell lies.
but its better to say: criminals lie or criminals tell lies.

and if you mean that the criminals are deceiving people you can say:

they're deceiving people
criminals are deceivers (criminals are deceiving people).


Q: Criminal psychology is scientific learning to study the actual condition of crime, the psychology of criminals and criminal behaviour. この表現は自然ですか?
A: Criminal psychology is the scientific study of the crime's condition, the psychology of criminals as well as their behaviour.

-Sorry. Your sentence was ok as well. I just have a habit of changing sentences -_-'
Q: there were two criminals on the case. but one of them is "culprit" and the other just helped planning crime. この表現は自然ですか?
A: I would say something like "There were two criminals in the case: one of them was the culprit and the other simply abetted him"

*abet is like 방조하다
Q: Some criminals pose a threat to the community and society. この表現は自然ですか?
A: It sounds very natural for the most part, but it would do good with some context. If this is in a paper, then it is perfect! If this is an independent sentence (by itself), you should clarify more.
Q: The criminals were caught red handed by the cops while trying to rob a house. この表現は自然ですか?
A: If you want to use that it would be "they were caught in the act while trying to rob a house."
Q: ​​Former criminals can share their experiences about the life in prison and help the youth realize the consequences that they have to take if they commit crimes.
Those who have completed their sentences can talk about the living conditions in prisons, a sense of loneliness and the desire to freedom. Such information may deter the youth from engaging in wrongdoings, as they will be afraid of losing freedom and confinement. この表現は自然ですか?
A: Former criminals can share their experiences about life in prison and help youth realize the consequences of committing crimes. Those who have completed their sentences could talk about the living conditions, sense of loneliness and their desire for freedom while in prison. Such information may deter the youth from engaging in bad activities(the last bit is kind of repetitive and unnecessary)