(v. t.) To come to the aid of; to subsidize; to support.

affirm afford support attest authenticate back back up bear bear up bolster bolster up buttress certify circumstantiate confirm corroborate crutch document finance fortify fund give support hold up justify keep lend support maintain probate prop prop up prove ratify reinforce shore shore up strengthen subsidize substantiate subvention subventionize support sustain undergird upbear uphold upkeep validate verify warrant