accelerate, agent provocateur, aggravate, amplify, annoy, augment, beef up, blow up, broaden, build up, burrow, complicate, concentrate, condense, consolidate, countersink, depress, deteriorate, dig, dig out, dive, double, dredge, drill, embitter, enhance, enlarge, exacerbate, exaggerate, exasperate, excavate, expand, extend, heat up, heighten, hop up, hot up, increase, intensify, irritate, jazz up, key up, lower, magnify, make acute, make complex, make worse, mine, mount, outspread, outstretch, provoke, ramify, redouble, reinforce, rise, rouse, scoop out, sharpen, sink, soup up, sour, spread, spread out, step up, strengthen, triple, tunnel, whet, widen, worsen
increase, augment, add to, enlarge, dilate, grow, wax, get ahead, gain strength, advance, run up, shoot up, rise, ascend, sprout, aggrandize, raise, exalt, deepen
, heighten, strengthen, intensify, enhance, magnify, redouble, aggravate, exaggerate, exasperate, exacerbate, add fuel to the flame, oleum addere camino, superadd, spread.
be deep, render deep, deepen
, plunge, sound, fathom, plumb, cast the lead, heave the lead, take soundings, make soundings, dig.