rut

Meanings

• a groove or furrow (especially one in soft earth caused by wheels)
• a settled and monotonous routine that is hard to escape
  • "they fell into a conversational rut"
• applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
• be in a state of sexual excitement; of male mammals
• hollow out in the form of a furrow or groove

Synonyms

estrus, furrow, groove, heat, oestrus