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Use "vastly" in a sentence
"It was an expression vastly different from the tired helplessness she had seen in the faces of men coming home from the war after the surrender."
"And I, as you may have picked up, tend to think the term vastly overused hereabouts ..."
"The WS410 access point sports six antenna and uses beamforming -- a single radio method of handling signal reflection and directionality -- to provide what they term a vastly increased coverage area."