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to oscillate
01
to move back and forth repeatedly between two points or positions
02
to frequently change between different viewpoints or beliefs without settling on a fixed one
Example
The windshield wipers on the car oscillated, clearing the raindrops with each motion.
The pendulum swung back and forth, oscillating steadily over time.
The metronome on the piano oscillated, providing a steady beat for the musician to follow.
The nanoparticles demonstrated resonance, oscillating and interacting with the incident radiation.
Political views may oscillate from liberal to conservative as people experience different life stages.