pertness's Usage Examples:

him fled from Egypt an Albanian slave named EI Ahmed, who (from the expertness with which he had been wont to carry out his master's orders to get rid of inconvenient rivals) bore the surname el-Jazzar, " the butcher.

When disturbed they make for the water, in which they swim and dive with expertness, often remaining below the surface for several minutes.

His unrivalled and various learning, his dialectical expertness, and his massive judgment, rendered him a formidable antagonist; but the respect entertained for him by his opponents was chiefly aroused by his recognized love of truth and superiority to personal considerations.

Among the Pagurinea is the Birgus latro, or robber-crab, whose expertness in climbing the coco-nut palm need no longer be doubted, since in recent years it has been noted and photographed by trustworthy naturalists in the very act.

Synonyms:

playfulness, impertinence, archness, fun, sauciness, perkiness,

Antonyms:

unhappiness, happiness, dull, gravity, courtesy,