反芻

Meanings

1. Noun, Suru verb, Transitive

   rumination; regurgitation; chewing the cud
2. turning over in one's mind; thinking over (something); pondering; musing; rumination (about a subject)

• 改あらためて反芻はんすうしてると、何なんだか恥はずかしいぞ。

  Now that I think over it, it's somewhat embarrassing.