Ingredient
来自Big Physics
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late Middle English: from Latin ingredient- ‘entering’, from the verb ingredi, from in- ‘into’ + gradi ‘walk’.
wiktionary
From Middle French ingredient, from Latin ingrediens, present participle of ingredior(“I go or enter into or onto”).
etymonline
ingredient (n.)
in early use also engredient, early 15c., "something forming part of a mixture," from Latin ingredientem (nominative ingrediens) "that which enters into" (a compound, recipe, etc.), present participle of ingredi "go in, enter," from in- "in" (from PIE root *en "in") + gradi "to step, go" (from PIE root *ghredh- "to walk, go"). Also from early 15c. as an adjective, "forming part of a mixture."
