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fluctuating
/ˈflʌk.tʃu.eɪ.tɪŋ/
changing unpredictably
The stock market's fluctuating prices made investors nervous.
Prices that rise and fall unpredictably cause anxiety among investors.
neutral
changing frequently and irregularly in size, amount, or level
The fluctuating exchange rates affected our travel budget.
Unpredictable currency value changes impacted our planned expenses.
Her fluctuating moods made it hard to plan activities.
Her unpredictable emotional states created scheduling difficulties.
Often used to describe variables that shift without a clear pattern, such as prices, emotions, or environmental conditions.
Collocations
fluctuating pricesprices that rise and fall unpredictablyfluctuating exchange ratescurrency values that change frequentlyfluctuating moodsemotional states that shift unpredictably
Pro Tip
Collocation Tip
Pair 'fluctuating' with nouns describing variables that change unpredictably, such as 'fluctuating temperatures' or 'fluctuating hormone levels'.
Gold Rule
Avoid Overuse
Reserve 'fluctuating' for changes that lack a clear pattern. For gradual or predictable changes, use 'changing' or 'varying'.
Word Origin
From Latin *fluctuare* (to sway, fluctuate), from *fluctus* (wave, billow), derived from *fluere* (to flow). First used in English in the 17th century to describe literal waves before extending to abstract changes.
Usage Notes
Common in financial, scientific, and emotional contexts. Avoid using for predictable or gradual changes (e.g., 'the sun fluctuating in the sky' is incorrect; use 'moving' instead).
Word Breakdown
fluctuat-
to wave or surge
root-ing
present participle suffix
suffixEnglish Dictionary