IPA: /ˌɪntərˈbɜːroʊ/
KK: /ˈɪntərˌbɜroʊ/
Relating to or occurring between different boroughs, which are administrative divisions in a city or town.
The interborough transportation system connects various neighborhoods across the city.
Interborough → It is formed from "inter-" (meaning between) and "borough" (from Old English "burg", meaning a fortified place or town). The word "interborough" refers to something that exists or occurs between different boroughs or towns.
Think of things that happen 'between' ('inter-') different 'towns' ('borough') — that's what interborough means.