1. (v. i.) To plunge into water head foremost; to thrust the body under, or deeply into, water or other fluid.

2. (v. i.) Fig.: To plunge or to go deeply into any subject, question, business, etc.; to penetrate; to explore.

3. (v. t.) To plunge (a person or thing) into water; to dip; to duck.

4. (v. t.) To explore by diving; to plunge into.

5. (n.) A plunge headforemost into water, the act of one who dives, literally or figuratively.

6. (n.) A place of low resort.

abate ablate acrobatics aerobatics alehouse bagnio banking bar barrel house barroom bate bathe bawdyhouse be eaten away beat down beer garden beer parlor belly buster belly flop belly whopper bistro blind tiger bordello bound break break water breaking water brothel burst cabaret cafe cannonball catabasis cathouse chandelle cheapen cheapening clip joint club cocktail lounge collapse consume consume away corrode countersink crabbing crash crash dive crib cropper crumble culbute cut cut prices deceleration declension decline decline and fall decrease decrescendo deepen deflate deflation deliquesce den den of thieves den of vice depreciate depreciation depress descend devaluate devaluation die away dig diminish diminuendo dip disorderly house diving downtrend downturn dramshop drill drinking saloon drive drop drop off duck dump dwindle dwindling ebb erode excavate fall fall away fall in price fall off fishtailing fleshpots float flood negative flood the tanks flop forced landing gainer gin mill give way glide go below go in swimming go in wading go under groggery grogshop gyp joint hangout header hole honky-tonk house of assignation house of joy house of prostitution impel jackknife jew down joint jump lair languish lapse leap lessen let up local lose altitude lounge lower lowering lunge mark down markdown melt away mine move nightclub nose dive nose-dive nosedive panel den panel house parachute parachute jump pare pitch plop plummet plummeting plump plunge plunk pothouse pounce pounce on pounce upon power dive pratfall price cut price fall price reduction pub public public house pull-up pullout pushdown rathskeller red-light district reduce reduction remission retreat rig for diving rolling rumshop run low running dive sag saloon saloon bar settle shave shrink sideslip sink sink of iniquity skin-dive skinny-dip sky dive sky-dive slash slowdown slump sound speakeasy spill spiral sporting house sprawl spring stall stationary dive stew stews stoop stumble stunting submerge submergence subside subsidence surface surfacing swan dive swim swoop swoop down tactical maneuvers tail off take a header taproom tavern tenderloin tread water trim trip tumble tunnel volplane wade wane waste waste away wear wear away whorehouse wine shop zoom