Restlessness

His restlessness gave her a hint that something was wrong.

Source: tatoeba (934475)

Then they themselves retired to rest, and this was the first night, for a long time past, that they slept soundly: they found that fatigue was the best remedy for the restlessness of love.

Source: tatoeba (6212497)

Instinctively they fly toward the friendly support of some tall weed where, as if feeling more secure on their feet than in the air, they resume their antics, hanging their heads downward, twirling their tails, jumping from one weed to another, and each bird apparently communicating its restlessness to its neighbor, until the whole colony is in a state of ferment.

Source: tatoeba (10963202)

You know how impetuous our friend is ordinarily, what a soul of restlessness and energy, never content unless he is rushing at some object, like a sportive bull at a red shawl; but amiable withal.

Source: tatoeba (11674328)