"to be," is rendered "consist" (lit., "is") in Luke 12:15 .
2: συνίστημι
(Strong's #4921 — Verb — sunistemi — soon-is-tah'-o, soon-is-tah'-an'-o, soon-is-tah'-ay-mee )
sun, "with," histemi, "to stand," denotes, in its intransitive sense, "to stand with or fall together, to be constituted, to be compact;" it is said of the universe as upheld by the Lord, Colossians 1:17 , lit., "by Him all things stand together," i.e., "consist" (the Latin consisto, "to stand together," is the exact equivalent of sunistemi). See APPROVE , COMMEND , MAKE , STAND.
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