ALTERNATE (4)

Al″ter‐nate, v. i. 1. 1. To happen, succeed, or act by turns; to follow reciprocally in place or time; — followed by with; as, the flood and ebb tides alternate with each other.
Rage, shame, and grief alternate in his breast. J. Philips. Different species alternating with each other. Kirwan. 2. 2. To vary by turns; as, the land alternates between rocky hills and sandy plains.