This is the 777th most frequent German word.
hintergrund
Background.
Here, 'Hintergrund' refers to the area or scenery behind the subject of the picture.
Der Hintergrund des Bildes ist ein wunderschöner Sonnenuntergang.
The background of the picture is a beautiful sunset.
Here, 'Hintergrund' is used metaphorically to describe someone's educational or professional foundation.
Er hat einen wissenschaftlichen Hintergrund in der Physik.
He has an academic background in physics.
In this sentence, 'Hintergrund' describes the auditory or spatial environment contributing subtly to the main event.