IPA: //ˈstriːm.bɛd//
KK: /ˈstrimˌbɛd/
The area or channel where a natural stream of water flows or used to flow.
The fish swam happily in the clear water of the streambed.
Streambed → It is formed from "stream" (from Old English *stream*, meaning a flowing body of water) and "bed" (from Old English *bedd*, meaning a place to lie or rest). The word "streambed" refers to the ground or bottom of a stream where water flows.
Think of a 'stream' as a flowing body of water and a 'bed' as a place where something rests. Together, they create the idea of the ground where the water flows.