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. 纯粹地; 完全地
adverb [方式副词]完全地，仅仅；贞淑地，清洁地
It is a racing machine, designed purely for speed. 那是一部赛车，完全是为速度而设计的。
