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

Along her sensitive, fluctuant nostrils the casual crinkle of distaste and suspicion had deepened suddenly into sheer dilating terror.

From The White Linen Nurse by Eleanor Hallowell Abbott

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

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