flecu -fle- gismu

x1 is a current/flow/river of/in x2 flowing in direction to/towards x3 from direction/source x4.

[x1 is a stream of x2; x2 is a fluid Gas or liquid. (= selfle for reordered places); x1 flushes toward x3; flush (= caifle, sukfle)]; See also rirxe, senta where no directionality is implied, rinci, xampo, dikca, sakci, gapci, litki, ciblu.

In notes:

ciblu
x1 is blood/vital fluid of organism x2.
dikca
x1 is electricity [electric charge or current] in/on x2 of polarity/quantity x3 (def. negative).
gapci
x1 is gaseous/fumes/a gas/vapor of material/composition including x2, under conditions x3.
litki
x1 is liquid/fluid, of composition/material including x2, under conditions x3.
rinci
x1 liquid/fluid drains/strains/flushes from source x2 through drain/strainer x3 by force x4.
rirxe
x1 is a river of land mass x2, draining watershed x3 into x4/terminating at x4.
sakci
x1 sucks/is suction/vacuum/relatively low pressure of fluid/gas x2 relative to high pressure x3.
senta
x1 is a layer/stratum [shape/form] of x2 [material] within structure/continuum/composite x3.
xampo
x1 is x2 ampere(s) [metric unit] in current (default is 1) by standard x3.
brajau
x1 is a big expanse of water, river/sea/lake
fleca'e
x1 washes x2 away and is a current/flow/river of/in x3.
flefamtu'u
x1 is a faucet made of material x2 with flow rate x3 and water pressure x4
fletroca'a
x1 is a valve, a device that controls the flow of x2 through a pipe x3
jaclu'a
p1 is a waterway to p2 from p3 via/defined by points including p4 (set).
jicfle
x1=f1 is a tributary of x2=f2 flowing in direction to/towards x3=f3=j1 from direction/source x4=f4
klafle
x1 is a flux/traffic of pedestrians/vehicles x2 going to x3 from x4
delfinu
x1 is a dolphin/porpoise of species/breed x2.
flaukse
x1 is the vector flux (flow) of quantity/substance (count) x2 through (geometric/imaginary) hypersurface/embedded manifold x3 per unit hyperarea per unit time.
flaumji
x1 is the scalar flux (total flow) of quantity/substance x2 through bounding Jordan orientable manifold x3 under conditions and conventions of definition x4 (including actual orientation of x3, signum of outflux, etc.)