* Simple: After a tough day, she liked to ruminate over her thoughts while taking a long walk.
* Figurative: The writer ruminated on the meaning of life, searching for a deeper understanding.
* Formal: The philosopher ruminated on the complex philosophical questions of free will and determinism.
* Active: The cow ruminated on the grass, chewing slowly and thoughtfully.
* Negative: He ruminated on his past mistakes, letting them consume him with guilt.
Remember: "Ruminate" often suggests a slow, thoughtful process of considering ideas or experiences, often with a sense of seriousness or introspection.