downfall

1. (intransitive) To fall down; deteriorate; decline.Examples: "[...] wants to make civilization his subject, he will have a hard time proceeding with the sentence unless collapse is in his active vocabulary, for he cannot say "our civilization will downfall" or "fall down.""; "Common belief has been that in the future the number of middle managers will downfall due to empowerment and team-building."; "It should be noted that the magnitude of satellites decreases when tuning out of degeneracy, and in the wavelength range of 1.2-1.3 pm it downfalls to the value of 10-15% of the main spike magnitude."intransitive