Use 'break down' when something suddenly stops functioning, often inconveniently.

Unexpected Failures

'Break down' can refer to non-physical processes like systems or negotiations failing.

Not Always Physical

It implies reducing complexity by splitting something into understandable parts.

Suggests an organized approach to dealing with large or complex tasks or information.

Indicates a strong emotional response that one can no longer contain, often publicly.

Shows a moment of vulnerability, regardless of the person's usual composure.

Often linked with bodily functions related to digestion or decomposition.

In technical fields, it describes the transformation of substances often invisible to the eye.

Highlights situations where dialogue or negotiation reaches an impasse.

Applies to any type of relationship or agreement, not just romantic ones.