oscillating
v. C1 Advanced US //ˈɑsəˌɫeɪtɪŋ// UK //ˈɒsɪlˌeɪtɪŋ// os·cil·lat·ing
v. moving back and forth in a regular way, like a pendulum. It can also describe a value that keeps changing between two different levels.
v. moving or varying between two states, values, or positions in a regular, rhythmic manner. Often describes physical motion or fluctuating data points.
The pendulum is oscillating slowly.
The stock price has been oscillating between ten and twelve dollars for the last month.
In physics, an oscillating system like a spring or a tuning fork returns to its equilibrium position after being displaced, following a predictable sine wave pattern.