'doom-and-gloom' originates from the combination of 'doom,' meaning 'fate or destiny,' and 'gloom,' meaning 'darkness or sadness.'

The phrase 'doom-and-gloom' evolved from the individual meanings of 'doom' and 'gloom' to describe a pervasive sense of negativity.

Initially, 'doom' referred to fate, often negative, and 'gloom' to darkness. Together, they now convey a sense of pervasive negativity.