Something that is very expensive.
Что-то, что очень дорого. (Chto-to, chto ochen' dorogo.)
"That new phone costs an arm and a leg, but it’s worth it."
"Этот новый телефон стоит целое состояние, но он того стоит." (Etot novyy telefon stoit **tseloe sostoyanie**, no on togo stoit.)
to admit something honestly
to make a special effort to achieve something
to work through the details of something by discussion
to start over again after a failure
To keep something secret.
to pursue what you truly want in life