yaw

(noun) an erratic deflection from an intended course. Synonyms: swerve.

(verb) be wide open. Synonyms: gape, yawn. Example: "The deep gaping canyon."

(verb) deviate erratically from a set course. Example: "The yawing motion of the ship."

(verb) swerve off course momentarily. Example: "The ship yawed when the huge waves hit it."