slip away
US /slɪp əˈweɪ/
UK /slɪp əˈweɪ/

1.
escapar, sumir
to leave secretly or without being noticed
:
•
He tried to slip away from the party unnoticed.
Ele tentou escapar da festa sem ser notado.
•
The cat managed to slip away through the open door.
O gato conseguiu escapar pela porta aberta.
2.
desvanecer, escapar
to pass or disappear gradually
:
•
Time seemed to slip away quickly during the holidays.
O tempo parecia escapar rapidamente durante as férias.
•
His memories began to slip away as he got older.
Suas memórias começaram a desvanecer à medida que ele envelhecia.