Forever

cały czas

((colloquially) constantly or frequently)

całą wieczność

((colloquially) for a very long time)

na zawsze

(for all time, for all eternity; for an infinite amount of time)

na zawsze

((colloquially) for an excessively long time)

na zawżdy

(for all time, for all eternity; for an infinite amount of time)

po wsze czasy

(for all time, for all eternity; for an infinite amount of time)