gateway
US /ˈɡeɪt.weɪ/
UK /ˈɡeɪt.weɪ/

1.
2.
a means of access or a point of entry to something larger or more significant
:
•
This city is often called the gateway to the West.
•
Education is the gateway to opportunity.
a means of access or a point of entry to something larger or more significant