Break down or breakdown?

verb To stop functioning

I am afraid my computer will break down if I try to run it at too high a speed

noun Alternative form of breakdown

noun Alternative form of breakdown

verb To unexpectedly collapse, physically or in structure

verb To intentionally demolish; to pull down

verb To fail, especially socially or for political reasons

Talks broke down between Prime Minister John Doe and the opposition party

verb To give in or give up: relent, concede, surrender

Is it worth taking it to a repair shop, or should I just break down and buy a new one?

verb To render or to become unstable due to stress, to collapse physically or mentally

Near-synonym: come undone

noun A failure, particularly one which is mechanical in nature

Whenever he was behind the wheel, he would panic at the first sign of a breakdown

noun The sudden (and usually damaging) transition of an electrical insulator to a conductor when subjected to a sufficiently strong voltage, caused by the partial or complete ionization of the insulator…

noun Something, such as a vehicle, that has experienced a mechanical failure

We saw a breakdown by the side of the road

noun Detailed categorization, or itemization or listing, of the components of a thing; (countable) an instance of this

Looking at the breakdown of the budget, I see a few items we could cut

noun Breaking of chemical bonds within a compound to produce simpler compounds or elements; (countable) an instance of this

noun A detailed description of a forthcoming project or screenplay which identifies all the required elements, such as the cast, costumes, equipment, props, and special effects

noun A failure in a relationship; a failure or loss of organization in a system

noun (Sudden) worsening of physical health or (more commonly) mental stability, resulting in an inability to carry on normal activities; (countable) an instance of this

After so much stress, he suffered a breakdown and simply gave up