ADV
仅仅；完全
You use purely to emphasize that the thing you are mentioning is the most important feature or that it is the only thing which should be considered.
例句
It is a racing machine, designed purely for speed...
那是一个比赛用的机器，完全是为提高速度设计的。
The government said the moves were purely defensive.
政府说这些举措纯粹是出于防御目的。