at

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at OE. æt = OS. at, OHG. az, ON., Goth. at; CGmc. prep. and verbal prefix denoting position and motion towards, further rel. to L. (and Osco-Umbrian) ad to, at, AD-, OIr. ad-. Lost in s.w. Eng. dial., as in modDu. and G., and repl. by to; in Scand., on the other hand, to was lost and repl by at (e.g. with the infin.; cf. ADO).

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