TIL A Loch is a Lake

Bram Adams -

BRO A LOCH IS A LAKE?

loch  
/läk,läKH/  
noun SCOTTISH  
a lake.

I had always assumed it was something unique.

Rivers and lochs
https://www.youtube.com/watch?v=vpMNj70e1Yw&list=WL&index=6&ab_channel=GeorgeDunnett