undermine Antonyms

praise steepen strengthen subsidized subvene subventionize support sustain toughening toughen underbrace undergird stanchion spore sown promote raise reenforce refine reforge reinforce restrengthen shored shoring shote slab underlie underline underpin juice up ruggedize prop up reboot brush up polish up buck up build on add value amp up refinance reflate dynamise succour underset upbear uplift vitrify brisken work up jump-start