fluctuant

The result was an unflattering portrait that emphasized "strong, although fluctuant, emotional attachments" and "sudden and extreme shifts in loyalty and enthusiasm."

From Time Magazine Archive

With fluctuant blackness against immutable blackness great sweeping pine trees swished weirdly into the horizon.

From Peace on Earth, Good-will to Dogs by Eleanor Hallowell Abbott

In the middle of the camp Daddy John's fire flared, the central point of illumination in a ring of fluctuant yellow.

From The Emigrant Trail by Geraldine Bonner

Somewhere fluctuant in my memory runs broken music—you have heard it?—"an ineffectual angel, beating his luminous wings within the void,"—something like that,—words descriptive of Shelley—they haunt me whenever I would recall Kristofer Hansteen.

From Mother Earth, Vol. 1 No. 3, May 1906 Monthly Magazine Devoted to Social Science and Literature by Emma Goldman

Just now, therefore, Francis Lingen flowed murmuring on his way, like a purling brook, rippling, fluctuant, carrying insignificant straws, insects of the hour, on his course, never jamming, or heaving up, monotonous but soothing.

From Love and Lucy by Maurice Henry Hewlett