to suffer from a bad experience or mistake
страдать из-за плохого опыта или ошибки (stradat' iz-za plokhogo opyta ili oshibki)
"He burned his fingers investing in that fake company."
"Он пострадал, инвестировав в эту фиктивную компанию." (On postradal, investirovav v etu fiktivnuyu kompaniyu.)
difficulty trusting others due to past experiences
A person with two very different sides to their personality.
you shouldn't form an opinion on someone or something based...
to clear one’s thoughts or fix mental confusion
a hacker who uses skills ethically to improve security
a small part of a larger situation or problem