downfall

A precipitous decline in fortune; death or rapid deterioration, as in status or wealth.countableuncountable

• Many economic and political reasons led to the downfall of the Roman Empire.

The cause of such a fall; a critical blow or error.countableuncountable

• Orson Scott Card It is the downfall of evil, that it never sees far enough ahead.

An act of falling down.countableuncountable

• a downfall of rain

To fall down; deteriorate; decline.intransitive

• 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.