1. Lend moral support to 
2. Make secure underneath
   "undergird the ship"
   - brace up

Derived forms: undergirded, undergirding, undergirds

Type of: back up, beef up, fortify, strengthen, support

• outsized
• outskirt
• outskirts
• outsmart
• outsole
• outsource
• outspan
• outspend
• outspoken
• outspokenly
• outspokenness
• outspread
• outstanding
• outstandingly
• outstare
• theme song
• themed
• Themis
• Themistocles
• themself
• themselves
• then
• then again
• thenal
• thenar