Unfluctuating

Part of speech: adjective

Definitions

1. Exhibiting a stable and unchanging quality without any variations
2. Demonstrating a constant and steady condition that remains unaffected by changes
3. Showing no signs of change or variation over time or circumstances

Etymology: "Unfluctuating" is a plain formation: the prefix "un-", meaning "not," attached to "fluctuating," the present participle of "fluctuate." Its meaning, steady over time, follows directly from that negation, so the word needs no special story beyond its parts. The base verb "fluctuate" comes from the Latin "fluctuare," meaning "to wave" or "to surge," built on "fluctus," a wave. That sense of rising and falling like water still lies underneath the word: something that fluctuates swings up and down, and something unfluctuating holds its level instead.

Synonyms: stable, constant

Antonyms: variable, changing