interfold /in-tər-fōldˈ/

To fold one into the other

• spines
• spinescence
• spinescences
• spinescent
• spinet
• spine-tingling
• spinets
• spinette
• spinettes
• Spinhaler
• spinier
• spiniest
• spiniferous
• spinifex
• spinifexes
• spiniform
• spinigerous
• spinigrade
• spininess
• spininesses
• spink
• spinks
• spinnaker
• spinnakers
• spinner