10. He acted very Sillily.
"Practical Grammar and Composition"
Thomas Wood
Finally, in desperation, he drew some old letters from his pocket and began to re-read them, finding such employment better suited to his taste than staring Sillily back at the many pairs of eyes which were now beholding him.
"The Man from Jericho"
Edwin Carlile Litsey
She put them down rather hastily when she got there, because, Sillily enough, she thought, for the merest instant, she was going to faint.
"The Vertical City"
Fannie Hurst