1
Stage 1 of 3
fluere
Latin · ancient
"to flow"
to flow, giving rise to fluctus (a wave)
2
Stage 2 of 3
fluctuare
Latin · ancient
"to wave, to undulate"
to wave, to undulate, from fluctus (wave)
3
Stage 3 of 3
fluctuate
English · 1600s
"to rise and fall irregularly in number or amount"
settled as the English word for rising and falling irregularly
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