underpinˈ transitive verb

1. To support by building underneath, or to prop up (also figurative)
2. To corroborate

underpinnˈing noun

• ravens
• raven's-bone
• raven's-duck
• raver
• ravers
• raves
• rave-up
• rave-ups
• ravin
• ravin'd
• ravine
• ravined
• ravines
• raving
• ravingly
• raving mad
• ravings
• ravining
• ravins
• ravioli
• raviolis
• ravish
• ravished
• ravisher
• ravishers