ad. In an intriguing manner; with intrigue; with artifice or secret machinations.
the GNU version of the Collaborative International Dictionary of English
ad. By means of, or in the manner of, intrigue.
The Century Dictionary and Cyclopedia
With intrigue; with artifice or secret machinations.
Word Usage
"In the general business agenda, the most intriguing item is a supplemental item titled intriguingly "Resolution in Support of the City of Durham Playing a Role in the Federal Stimulus Package.""