Having been united in substance or essence; made to share the same fundamental nature.
From 'consubstantiate' (verb) in past participle form, '-ed' (past tense marker). The past participle describes a completed state of substances being unified.
Luther and other Reformation leaders specifically used this word instead of the Catholic 'transubstantiated' to describe their different beliefs about communion—literally, they argued about which past participle was correct, showing how theology is basically a game of incredibly precise language.
Complete word intelligence in one call. Free tier — 50 lookups/day.