IPA: //trænˈspɒntaɪn//
KK: /træn'spɔːtaɪn/
Relating to or characteristic of theaters that were located south of the Thames River in London, often associated with melodramatic performances.
The transpontine theaters were known for their lively and dramatic productions.
Transpontine → It is formed from "trans-" (meaning across) and "Pontine" (from Latin "pons" meaning bridge). The term refers to something located across a bridge, particularly in relation to a geographical area or context.
Think of something that is located 'across' ('trans-') a 'bridge' ('Pontine') — that's why transpontine refers to areas across a bridge.