Pas

google

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French.

wiktionary

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Borrowed from French pas.

pas

etymonline

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pas (n.)

"a step in dancing," a French word in English, 1775, from French pas "a step, track, passage," from Latin passus "step, pace" (from PIE root *pete- "to spread"). Used in forming names for types of dances, such as pas de deux "dance for two persons" (1762).