The lower side of anything.

synonyms: underside, undersurface.

Roget 252: concavity, depression, dip; hollow, hollowness; indentation, intaglio, cavity, dent, dint, dimple, follicle, pit, sinus, alveolus^†, lacuna; excavation, strip mine; trough etc. (furrow) 259; honeycomb.    cup, basin, crater, punch bowl; cell etc. (receptacle) 191; socket.    valley, vale, dale, dell, dingle, combe^†, bottom, slade^†, strath^†, glade, grove, glen, cave, cavern, cove; grot^†, grotto; alcove, cul-de-sac; gully etc. 198; arch etc. (curve) 245; bay etc. (of the sea) 343.    excavator, sapper, miner.    honeycomb (sponge) 252.1. ... show more

Roget 604a: perseverance; continuance etc. (inaction) 143; permanence etc. (absence of change) 141; firmness etc. (stability) 150.    constancy, steadiness; singleness of purpose, tenacity of purpose; persistence, plodding, patience; sedulity etc. (industry) 682; pertinacy^†, pertinacity, pertinaciousness; iteration etc. 104; bottom, game, pluck, stamina, backbone, grit; indefatigability, indefatigableness; bulldog courage.    ... show more

Roget 211: base, basement; plinth, dado, wainscot; baseboard, mopboard^†; bedrock, hardpan [U.S.]; foundation etc. (support) 215; substructure, substratum, ground, earth, pavement, floor, paving, flag, carped, ground floor, deck; footing, ground work, basis; hold, bilge.    bottom, nadir, foot, sole, toe, hoof, keel, root; centerboard.    ... show more

Roget 861: courage, bravery, valor; resoluteness, boldness etc. adj.; spirit, daring, gallantry, intrepidity; contempt of danger, defiance of danger; derring-do; audacity; rashness etc. 863; dash; defiance etc. 715; confidence, self-reliance.    manliness, manhood; nerve, pluck, mettle, game; heart, heart of grace; spunk, guts, face, virtue, hardihood, fortitude, intestinal fortitude; firmness etc. (stability) 150; heart of oak; bottom, backbone, spine etc. (perseverance) 604.1. resolution etc. (determination) 604; bulldog courage.    prowess, heroism, chivalry.    exploit, feat, achievement; heroic deed, heroic act; bold stroke.    man, man of mettle; hero, demigod, Amazon, Hector; lion, tiger, panther, bulldog; gamecock, fighting-cock; bully, fire eater etc. 863.    ... show more

Dutch: onderkant, onderzij, onderzijde
Polish: dół

The lowest part of anything.

Dutch: onderkant, bil, bodem, onderste

The fleshy part of the human body that you sit on.

synonyms: arse, ass, backside, behind, bum, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, tush ... show more.

Dutch: achterste, achtersteven, achterwerk, batterij, bibs, bips, derrière, fundament, gat, hol, kont, krent, posterieur, reet, tooches, zitvlak ... show more
Polish: cztery litery, pupa, tyłek, zadek

The second half of an inning; while the home team is at bat.

synonym: bottom of the inning.

A depression forming the ground under a body of water.

synonym: bed.

Dutch: bed, bedding, rivierbed, rivierbedding, stroombedding
Polish: dno

Low-lying alluvial land near a river.

synonym: bottomland.

A cargo ship:
— They did much of their overseas trade in foreign bottoms.

synonyms: freighter, merchant ship, merchantman.

Roget 273: ship, vessel, sail; craft, bottom.    navy, marine, fleet, flotilla; shipping.    man of war etc. (combatant) 726; transport, tender, storeship^†; merchant ship, merchantman; packet, liner; whaler, slaver, collier, coaster, lighter; fishing boat, pilot boat; trawler, hulk; yacht; baggala^†; floating hotel, floating palace; ocean greyhound.    ship, bark, barque, brig, snow, hermaphrodite brig; brigantine, barkantine^†; schooner; topsail schooner, for and aft schooner, three masted schooner; chasse-maree [Fr.]; sloop, cutter, corvette, clipper, foist, yawl, dandy, ketch, smack, lugger, barge, hoy^†, cat, buss; sailer, sailing vessel; windjammer; steamer, steamboat, steamship, liner, ocean liner, cruisp, flap, dab, pat, thump, beat, blow, bang, slam, dash; punch, thwack, whack; hit hard, strike hard; swap, batter, dowse^†, baste; pelt, patter, buffet, belabor; fetch one a blow; poke at, pip, ship of the line; destroyer, cruiser, frigate; landing ship, LST; aircraft carrier, carrier, flattop [Coll.], nuclear powered carrier; submarine, submersible, atomic submarine.    boat, pinnace, launch; life boat, long boat, jolly boat, bum boat, fly boat, cock boat, ferry boat, canal boat; swamp boat, ark, bully, battery, bateau [Can.], broadhorn^†, dory, droger^†, drogher; dugout, durham boat, flatboat, galiot^†; shallop^†, gig, funny, skiff, dingy, scow, cockleshell, wherry, coble^†, punt, cog, kedge, lerret^†; eight oar, four oar, pair oar; randan^†; outrigger; float, raft, pontoon; prame^†; iceboat, ice canoe, ice yacht.    catamaran, hydroplane, hovercraft, coracle, gondola, carvel^†, caravel; felucca, caique^†, canoe, birch bark canoe, dugout canoe; galley, galleyfoist^†; bilander^†, dogger^†, hooker, howker^†; argosy, carack^†; galliass^†, galleon; polacca^†, polacre^†, tartane^†, junk, lorcha^†, praam^†, proa^†, prahu^†, saick^†, sampan, xebec, dhow; dahabeah^†; nuggah^†; kayak, keel boat [U.S.], log canoe, pirogue; quadrireme^†, trireme; stern-wheeler [U.S.]; wanigan^†, wangan [U.S.], wharf boat.    balloon; airship, aeroplane; biplane, monoplane, triplane^†; hydroplane; aerodrome; air balloon, pilot balloon, fire balloon, dirigible, zeppelin; aerostat, Montgolfier; kite, parachute.    jet plane, rocket plane, jet liner, turbojet, prop-jet, propeller plane; corporate plane, corporate jet, private plane, private aviation; airline, common carrier; fighter, bomber, fighter-bomber, escort plane, spy plane; supersonic aircraft, subsonic aircraft.    ... show more

Dutch: vrachtschip
Polish: statek handlowy

Provide with a bottom or a seat.

Roget 215: be supported &c.; lie on, sit on, recline on, lean on, loll on, rest on, stand on, step on, repose on, abut on, bear on, be based on &c.; have at one's back; bestride, bestraddle^†.    support, bear, carry, hold, sustain, shoulder; hold up, back up, bolster up, shore up; uphold, upbear^†; prop; under prop, under pin, under set; riprap; bandage etc. 43.    give support, furnish support, afford support, supply support, lend support, give foundations, furnish foundations, afford foundations, supply foundations, lend foundations; bottom, found, base, ground, imbed, embed.    maintain, keep on foot; aid etc. 707.    ... show more

Strike the ground, as with a ship's bottom.

Come to understand.

synonyms: fathom, penetrate.

Situated at the bottom or lowest position.

Roget 211: bottom, undermost, nethermost; fundamental; founded on, based on, grounded on, built on.   

Polish: dolny

The lowest rank.