To Break Down

1. (intransitive, of a machine, computer, vehicle, etc.) To stop functioning.
2. (intransitive) To unexpectedly collapse, physically or in structure. Coordinate terms: break apart, break up, fall apart, fall down
3. (transitive) To intentionally demolish; to pull down. Coordinate terms: break apart, break up, tear down
4. (intransitive) To fail, especially socially or for political reasons. Coordinate terms: break apart, break up
5. (intransitive, idiomatic) To give in or give up: relent, concede, surrender.
6. (ergative, figuratively) To render or to become Unstable due to stress, to collapse physically or mentally. Near-synonym: come undone
7. (ergative, figuratively) To render or to become weak and ineffective. Coordinate terms: wear away, wear down
8. (ergative) To (cause to) To Decay, to decompose.
9. To separate into a number of parts. Near-synonyms: break apart, break up, take apart, tear down, tear up
10. (ergative, figuratively) To divide into parts to give more details, to provide a more indepth analysis of. Near-synonym: To Analyze
11. (ergative) To digest. Near-synonym: To Catabolize