Sentence:  While McCarthy <WSD>prowled</WSD> the touchline barking orders, his opposite number watched on motionless and expressionless and, with 25 minutes to go, decided to throw on Nicolas Anelka for Kalou. 
Meaning of the word marked with <WSD> tags:  To rove over, through, or about in a stealthy manner; especially, to search in, as for prey or booty.