
unterhalb is one of the B1 words in the free course — with this picture, the audio, and spaced repetition.
unterhalb
below
/ˈʊntɐhalp/Examples — unterhalb in a sentence
Das Tal liegt unterhalb der Berge.
The valley is located below the mountains.
Die Temperatur fiel unterhalb des Gefrierpunkts.
The temperature fell below freezing point.
How to remember it
UN-ter-HALB sounds like 'under half' — something sinking 'below' the halfway mark in a glass of water.