This is the 694th most frequent Persian word.
قوی
Strong.
Here, 'قوی' is used as an adjective to describe the physical strength of the lions.
شیرها حیوانات قوی هستند.
Lions are strong animals.
In this sentence, 'قوی' is metaphorically used to describe the strength or impact of an idea.
آیا ایدهٔ قویتری دارید؟
Do you have a stronger idea?
Here, 'قوی' is used to describe the strength of one's character or personality.