She accepted the invitation with an alacrity that surprised me.
<having just acquired his driver's license that morning, the teen agreed with alacrity to drive his cousin to the airport>
Surely one of the most striking features of human dynamics is the alacrity with which those who have been oppressed will oppress whomever they can once the opportunity presents itself. —Randall Kennedy, Atlantic, May 1997
Every Disney worker I spoke to, from ticket sellers to gardeners sprucing up already-immaculate flower beds, knew the answer to my questions and responded with smiling alacrity. —Ken Tucker, Entertainment Weekly, 22 June 1990
… when he entered the drawing room before dinner, the buzz of discussion was high between Tom, Maria, and Mr. Yates; and Mr. Rushworth stepped forward with great alacrity to tell him the agreeable news. —Jane Austen, Mansfield Park, 1814