Eyeglance

And ever, as Dissemblaunce laught on him, / He lowrd on her with daungerous eyeglaunce […].

Perilous as her eyeglances were, and much as they menaced, Lord Etherington felt at this moment the importance of soothing Lady Penelope to silence […].

The sideways eye glance is a widespread expression combining a lowered head and the eyes looking sideways, thus taking advantage of boldness and shyness at the same time.