UNDERGIRD
undergird, brace up
(verb) make secure underneath; “undergird the ship”
undergird
(verb) lend moral support to
Source: WordNet® 3.1
Etymology
Verb
undergird (third-person singular simple present undergirds, present participle undergirding, simple past and past participle undergirded)
To strengthen, secure, or reinforce by passing a rope, cable, or chain around the underside of an object.
To give fundamental support; provide with a sound or secure basis; provide supportive evidence for.
To lend moral support to.
To secure below or underneath.
Synonyms
• shore up
• fortify
• succour
Antonyms
• undermine
Source: Wiktionary
Un`der*gird", v. t.
Definition: To blind below; to gird round the bottom.
They used helps, undergirding the ship. Acts xxvii. 17.
Source: Webster’s Unabridged Dictionary 1913 Edition