Entirely means completely and not just partly.
an entirely new approach.
一种全新的方法。
Their price depended almost entirely on their scarcity.
它们的价格几乎完全取决于它们的稀有程度。
The two operations achieve entirely different results.
这两种经营获得截然不同的结果。
This administration is not entirely free of suspicion.
这届政府并不是完全没有受到怀疑。
Entirely is also used to emphasize what you are saying.
I agree entirely.
我完全赞同。