to look down
The German phrase 'nach unten schauen' is used to express the action of looking downwards. It is a compound verb made up of 'nach unten' (downwards) and 'schauen' (to look). This phrase is used in a similar context as its English counterpart 'to look down'.
If you look down at your feet, you will see the anthill.
This phrase implies a physically downward gaze. The speaker is instructing another person to refocus their sight towards their feet in order to observe an anthill.
We can only look down at the stars when we are on the mountain.
This sentence uses the phrase 'nach unten schauen' in a less literal manner, referring to viewing something that is typically above us (the stars) from a higher vantage point (the mountain).
He avoids eye contact by always looking down.
Here, the phrase 'nach unten schauen' is used to describe a social behavior - avoiding eye contact by constantly directing one's gaze downwards.