ebb and flow

flood river stream tide

course draught drift flux jet juice progression run rush spate

tidal motion

good and bad times peaks and valleys systole and diastole wax and wane

eddy flow gush heave lapping murmur roll rush spurt surge surging sweep swell swirl swishing undulation

undulate

balloon belly bloat bounce bulge heave pitch ripple rock roll swell toss wave

puff up rise and fall rise up

shrink stabilize

oscillate seesaw vary veer waver

alter alternate flutter hesitate shift swing undulate vibrate wave

be undecided blow hot and cold go up and down hem and haw rise and fall yo-yo

remain stay

continue

hold persist