foreign
US /ˈfɔːr.ən/
UK /ˈfɔːr.ən/

1.
2.
estraneo, sconosciuto
not characteristic of oneself; unfamiliar or strange
:
•
His sudden anger was completely foreign to his nature.
La sua rabbia improvvisa era completamente estranea alla sua natura.
•
The concept of failure was foreign to him.
Il concetto di fallimento gli era estraneo.