Sentence:  They have established themselves as the greatest story of Euro 2016 and it feels almost like a trick of the imagination that it is only four years since they were ranked 133rd in the world. That, however, will not lessen the embarrassment for England, their departing manager and a set of players who <WSD>chronically</WSD> under-performed after Wayne Rooney's early penalty. 
Meaning of the word marked with <WSD> tags:  extremely