ungregarious

The servants seemed to hold themselves as much aloof as their mistress, and though Robert and his mother attended service regularly every Sabbath, they appeared as gravely silent and ungregarious as Sphinxes.

One or two other little groups were having some, too, but Mr. Cloudwater's party were singularly ungregarious, and avoided making acquaintances in hotels.

It came to him that she was, in truth, detached, sufficient to herself, an ungregarious creature moving solitarily in a mysterious world all her own.