In a smooth manner; with smooth, easy, or gentle movement or motion; gently.

Smoothly, in various senses.

In a free and easy manner; esp. without physical obstruction or hindrance, smoothly.

With a smooth gliding movement.

In a gliding manner.

In a soft or easy manner; smoothly. Also in sense 4 of soapy, adj.

In a silken manner; also in nonce-use (quot. 1846).

Smoothly, quietly; used esp. of the running of an engine or machine.