amplitude
Physics term for the maximum displacement or magnitude of an oscillation or wave. Cross-referenced with 振幅.
See also: 振幅
The amplitude of this pendulum is about 10 centimeters.
volatility; fluctuation; swing; range of variation
Figurative use for the degree of change or instability in non-physical contexts, such as prices, emotions, or performance.
Measure the amplitude of the earthquake.
The volatility of stock prices is increasing.
I'm surprised by the swings in his mood.
Compound of 振れ (fure, 'swing, oscillation', from verb 振れる) and 幅 (haba, 'width, range').