Agitated or turbulent movement of water, esp. the sea (now rare). Also (in later use chiefly): the straining, pitching, or rolling of a vehicle…

The swaying or rocking of something, esp. a vessel, from side to side; rotary movement of a vessel about an axis parallel to its direction of motion…

The heavy rolling or pitching movement of a vessel in rough seas. Cf. travail, v. 6, labour, v. 7b. Obsolete. rare.

Rotation of a vessel sideways about an axis parallel to its direction of motion; an instance of this. Cf. seel, n.

The rising and falling of a ship or vehicle esp. the forward, downward plunging of the bow or front end.

A leaping movement. Obsolete exc. Nautical (see quot. 1867) and dialect.

The action of labour, v. (in various senses); esp. the action of doing hard (often unskilled) physical work. Also: an instance of this.

An act of plunging head foremost; (Nautical) a forward longitudinal plunge or downward motion of the bows of a ship. Also with forward. See pitch, v.2…

Tumbling, falling, or tossing; esp. the pitching and rolling of a ship in a storm.

A sudden plunge (of a boat) aft, forward, etc.

The action of porpoise, v. (in various senses).