Sentence:  Fly-half Jonny Wilkinson put his below-par performance against Argentina behind him with a fine first-half showing, slotting four kicks from six and controlling his back-line with <WSD>aplomb</WSD>, while England's three-quarters were brimming with life and clinical with their execution. 
Meaning of the word marked with <WSD> tags:  self-confidence; poise; composure.