[1] : WordNet (r) 2.0

break down
     v 1: make a mathematical, chemical, or grammatical analysis of;
          break down into components or essential features;
          "analyze a specimen"; "analyze a sentence"; "analyze a
          chemical compound" syn: analyze, analyse, dissect,
           take apart ant: synthesize
     2: make ineffective; "martin luther king tried to break down
        racial discrimination" syn: crush
     3: lose control of one's emotions; "when she heard that she had
        not passed the exam, she lost it completely"; "when her
        baby died, she snapped" syn: lose it, snap
     4: stop operating or functioning; "the engine finally went";
        "the car died on the road"; "the bus we travelled in broke
        down on the way to town"; "the coffee maker broke"; "the
        engine failed on the way to town"; "her eyesight went
        after the accident" syn: fail, go bad, give way, die,
         give out, conk out, go, break
     5: separate substances into constituent elements or parts
        syn: decompose, break up
     6: fall apart; "the building crimbled after the explosion";
        "negociations broke down" syn: crumble, crumple, tumble,
         collapse
     7: cause to fall or collapse
     8: collapse due to fatigue, an illness, or a sudden attack
        syn: collapse
see also:
analyze analyse dissect take apart synthesize crush 
lose it snap fail go bad give way 
die give out conk out go break 
decompose break up crumble crumple tumble 
collapse 

[2] : Moby Thesaurus II by Grady Ward, 1.0

162 moby thesaurus words for "break down":
   afflict, aggrieve, alphabetize, analyze, anatomize, anguish,
   arrange, assay, assort, bawl, beat down, bend, blow, blow down,
   blubber, boohoo, break, break up, bring down, bring low,
   bring to tears, bring to terms, bulldoze, burn down, burn out,
   burst into tears, cast down, catalog, categorize, cave in,
   chop down, class, classify, codify, collapse, come to naught,
   come to nothing, conk out, conquer, crack up, crumble, crush, cry,
   cut down, cut up, decompose, desolate, digest, disintegrate,
   dissect, dissolve in tears, divide, draw tears, droop, drop,
   drop a tear, embitter, faint, fall down, fall flat, fall in,
   fall through, fatigue, fell, file, fizzle out, flag, flatten,
   founder, gasp, get bogged down, get hung up, get mired, get tired,
   give out, go haywire, go kaput, go wrong, grade, greet, grieve,
   group, grow weary, humble, humiliate, index, inundate, jade,
   knock down, knock over, level, list, master, molder, mow down,
   oppress, order, overmaster, overwhelm, pack up, pant, peg out,
   peter out, pigeonhole, place, play out, poop out, prostrate, puff,
   puff and blow, pull down, putrefy, quell, range, rank, rase, rate,
   raze, reduce, reduce to elements, resolve, rot, run down, run out,
   segment, separate, shed tears, sink, smash, snivel, sob, sorrow,
   sort, spoil, steamroller, subdivide, subdue, succumb, suppress,
   sway, tabulate, taint, take down, tear down, throw down, tire,
   topple, topple down, topple over, torment, totter,
   trample underfoot, tread underfoot, turn, type, tyrannize, unman,
   weary, weep, wheeze, whimper, wilt

Break Down >> B Words
Break Down, definition of term: Break Down
break+down_pag1.html

Break >> B Words
Break, definition of term: Break
break_pag1.html

Break Loose >> B Words
Break Loose, definition of term: Break Loose
break+loose_pag1.html

Break Wind >> B Words
Break Wind, definition of term: Break Wind
break+wind_pag1.html

Break Off >> B Words
Break Off, definition of term: Break Off
break+off_pag1.html

Break Out >> B Words
Break Out, definition of term: Break Out
break+out_pag1.html

Break Through >> B Words
Break Through, definition of term: Break Through
break+through_pag1.html

Break Even >> B Words
Break Even, definition of term: Break Even
break+even_pag1.html

Break Up >> B Words
Break Up, definition of term: Break Up
break+up_pag1.html

Break Bread >> B Words
Break Bread, definition of term: Break Bread
break+bread_pag1.html

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