fixed and unchangeable
неподвижный и неизменный (nepodvizhnyy i neizmennyy)
"The script isn’t cast in stone; we can make changes."
"Сценарий не каст ин стоун; мы можем внести изменения." (Stsenariy ne **kast in stoun**; my mozhem vnesi izmeneniya.)
to start something, especially a project or task
to dismiss or refuse something with a gesture or comment
to return to a topic or task later
to follow the official policies or opinions of one’s politic...
to take responsibility for something bad.
something of value used in negotiations to get a better deal