Definition from macmillandictionary.com
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I strained to hear what they were saying.
tourists straining for a view of the tower
I could keep up with him, without straining myself.
Relations between the two nations have been strained since the war.
I’ve strained a muscle in my shoulder.
Reading in poor light can strain your eyes.
The elephants strained at their ropes.
Tommy was straining against the straps of his car seat.