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
flu (flow) + -id (having the quality of)
fluent — able to speak or write smoothly and easily
flu (flow) + -ent (doing)
influence — the power to affect someone's actions or the course of events
in- (into) + flu (flow) + -ence (action or state)
confluence — a place where streams meet; a coming together
con- (together) + flu (flow) + -ence (action or state)
superfluous — more than is needed
super- (beyond) + flu (flow) + -ous (having the quality of)
mellifluous — sweet and smooth in sound
mell (honey) + flu (flow) + -ous (having the quality of)
fluctuate — rise and fall or change repeatedly
flu (flow) + -ate (act)

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