From Wikipedia:
It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity on the Pauling scale, behind only oxygen and fluorine.
I am confused with this quoting. Apparently, the somewhat vague concept of Linus Pauling's 'electronegativity' includes two concepts: Both the relative, quantified tendency to grab an electron and the relative, quantified tendency not to lose one. Combined into the somewhat-quantified, relative concept of electronegativity.