【with obj.】provide evidence to support or prove the truth of:
▷They had found nothing to substantiate the allegation.
▷He couldn't substantiate the allegations he made, and he lost the lawsuit.
を立証する（証拠をあげて事実を証明する）
allegation 申し立て/供述/主張
lawsuit 起訴
【with obj.】provide evidence to support or prove the truth of:
▷They had found nothing to substantiate the allegation.
▷He couldn't substantiate the allegations he made, and he lost the lawsuit.
を立証する（証拠をあげて事実を証明する）
allegation 申し立て/供述/主張
lawsuit 起訴