confident and sure of oneself
уверенный в себе (uverenniy v sebe)
"She walked into the room looking calm and self-assured."
"Она вошла в комнату, выглядела спокойной и уверенной в себе." (Ona voshla v komnatu, viglyadela spokoynoy i uverennoi v sebe.)
Things often seem worst just before they improve.
to try to teach someone something that is difficult for them...
affecting everyone or everything equally
to remove unwanted parts from something
not very intelligent
every difficult situation has a hopeful aspect