strain
In German, 'Anstrengung' is used to describe a physical or mental effort that can cause strain or stress. It can also refer to the resulting strain or tension. The word is often used in the context of demanding tasks or situations that require a lot of effort or concentration.
This task requires a lot of effort.
The sentence uses the noun 'Anstrengung' to communicate that the task is demanding or challenging, implying that it will require a significant amount of mental or physical effort.
He didn't shy away from the effort.
In this context, 'Anstrengung' indicates the effort the subject was willing to put into a task. The subject didn't shy away implying that he faced the task without hesitation although it was hard.
I see the effort in your eyes.
This sentence is saying that the effort or 'Anstrengung' someone is putting into something is apparent or noticeable, often indicating that the person is working hard or pushing themselves.