| Deepen 1. (v. t.) To make deep or deeper; to increase the depth of; to sink lower; as, to deepen a well or a channel. 2. (v. t.) To make darker or more intense; to darken; as, the event deepened the prevailing gloom. 3. (v. t.) To make more poignant or affecting; to increase in degree; as, to deepen grief or sorrow. 4. (v. t.) To make more grave or low in tone; as, to deepen the tones of an organ. 5. (v. i.) To become deeper; as, the water deepens at every cast of the lead; the plot deepens. Thesaurus Entries 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 |