basis, base, basic, elementary, foundation, ground-work, roots, origin,power, sources, capacity,belongings, possessions,start, beginning

undermine, weaken

fundamental, primary, basic, principal

found, lay a foundation, start or initiate

utterly destroy or demolish, tear down

start, establish, lay foundation

raise the wall on foundation, start

without foundation, groundless, baseless

origin, family

infirm, unstable, shaky