incapsulate /in-kapˈsū-lāt/

1. To enclose as in a capsule
2. To enclose (a modifying element) between other elements of a word

• rucksack
• rucksacks
• ruckseat
• ruckseats
• ruckus
• ruckuses
• rucola
• rucolas
• ructation
• ructations
• ruction
• ructions
• rud
• rudaceous
• rudas
• rudases
• rudbeckia
• rudbeckias
• rudd
• rudded
• rudder
• rudderfish
• rudderfishes
• rudderless
• rudders