flu/flux

flow

Spelled flu, flux · fluere 'flow'; fluxus 'flowing, a flow'

Latin fluere meant to flow: fluid moves, confluence joins streams, and mellifluous speech flows like honey.

Words built from it

fluid — able to flow; smooth and readily changing
Latin fluere (flow) → fluidus (flowing) → fluid
fluent — able to speak or write smoothly and easily
Latin fluere (flow) → fluens, stem fluent- (flowing) → fluent
influence — the power to affect someone's actions or the course of events
Latin in- (into) + fluere (flow) → influere → Medieval Latin influentia (a flowing in) → influence
confluence — a place where streams meet; a coming together
Latin con- (together) + fluere (flow) → confluere → confluentia (a flowing together) → confluence
superfluous — more than is needed
Latin super- (over, beyond) + fluere (flow) → superfluere (overflow) → superfluus → superfluous
mellifluous — sweet and smooth in sound
Latin mel, stem mell- (honey) + fluere (flow) → mellifluus (flowing with honey) → mellifluous
fluctuate — rise and fall or change repeatedly
Latin fluere (flow) → fluctus (wave) → fluctuare (move in waves) → fluctuate

fluster — Comes from a Scandinavian source related to bustling and confusion, not Latin fluere 'flow.'