tract - draw (tractor, contract, retract, tract, traction trail)
string - draw tight (strict, stringent, strain, redistrict, stricture, distraught)
sal - jump (assault, salient, assail, resilient, salmon, sally, resultant)
cresc - increase (crescent, crescendo, accrue, crew, concrescence, recruit
cur - run (current, concurrent, car, corridor, recur, curriculum)
ten - hold (tenant, pretend, pertinacious, tenor tenet, lieutenant)
tort - twist (distort, torture, extort, tortilla, nasturtium, tort)
solv - loosen (dissolve, solvent, absolution, soluble, resolve, dissolution)
frang - break (fragile, frangible, fraction, frail, refraction, infraction)
pend - to hang (pendulum, compendium, supsense, propend, impend)
vert - turn (convert, subversion, vertebra, vertigo, versatile, inversion)
flu - flow (fluid, influence, affluent, fluvial, influx, flush)