substantiate

verbs

establish or strengthen as with new evidence or facts

"his story confirmed my doubts"; "The evidence supports the defendant"

affirm, confirm, corroborate, substantiate, support, sustain

is derived from

is derived from

is derived from

represent in bodily form

"He embodies all that is evil wrong with the system"; "The painting substantiates the feelings of the artist"

make real or concrete; give reality or substance to

"our ideas must be substantiated into actions"

solidify, firm, or strengthen

"The president's trip will substantiate good relations with the former enemy country"

substantiate

is a type of (narrower)

make strong or stronger

"This exercise will strengthen your upper body"; "strengthen the relations between the two countries"