Burrito

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Latin American Spanish, diminutive of Spanish burro, literally ‘donkey’ (see burro).

wiktionary

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From Spanish burrito, diminutive of burro(“donkey”), from burrico(“donkey”), from Latin burricus(“small horse”), from burrus(“red-brown”), from Ancient Greek πυρρός(purrhós, “flame-colored”), from πῦρ(pûr, “fire”). The food is so called because of its resemblance to a rolled up pack as typically carried by burros.

etymonline

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burrito (n.)

Mexican food dish, 1934, from Spanish, literally "little burro" (see burro).