metamorphosis

noun
1
the process in which an insect or an amphibian (such as a frog) changes from its young form to its adult form in two or more separate stages
دگردیسی
2
a process in which somebody/something changes completely into something different
دگرگون‌شدن, تحول, تغییر شکل, استحاله, دگرگونی, دگرشدگی
She had undergone an amazing metamorphosis from awkward schoolgirl to beautiful woman.
synonym transformation