Etymology of the Greek word hupostasis (ὑπόστασις)
the Greek word hupostasis, ὑπόστασις (a setting under (support); concretely, essence, or abstractly, assurance (objectively or subjectively))
derived from the Greek word huphistasthai
derived from the Greek word hupo, ὑπό (under, beneath, underneath)
derived from the Greek word histasthai
derived from the Greek word huphisthanai