to swear that something is true, often said with sincerity
клясться, что что-то правда, обычно говорится искренне (klyastsya chto chto-to pravda obychno govoritsya iskrenne)
"I cross my heart and hope to die that I will never lie to you."
"Я клянусь и надеюсь умереть, если когда-нибудь тебе совру." (ya klyanus i nadeyus umeret esli kogda-nibud tebe sovru)
a chance to live or start something again after a period of...
to feel extremely anxious or scared
to pass something to someone of a later generation
to succeed or progress in one's life or career
to finish something before the deadline
a person who always follows the law