to stop believing in your own ability or someone else’s
потерять уверенность (poteryat' uverennost')
"Don’t lose confidence after one failure."
"Не теряй уверенности после неудачи." (Ne teryay uverennosti posle odnoi neudachi.)
to undergo a significant change or improvement
to destroy the possibility of returning to a previous situat...
a lazy person
to spend large amounts of money in a hasty or unwise way
having sworn to tell the truth in court
working in a laboratory environment on experiments or resear...
