To give something substance (actual existence)(verb)
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Use "substantialize" in a sentence
"These ultra-realist philosophers substantialize time; others again make it a complete being, but of the accidental order."
"They then proceed to substantialize by darkening in tint throughout."
"I liked well to see that strange life, which even the stout, dead-in - earnest little Bohemian musicians, piping in the centre of the Piazza, could not altogether substantialize, and which constantly took immateriality from the loveliness of its environment."