:— atte , at the, PP, S, S2, C2; ate , S, S2; ette , S; eter , S; atten , S2, PP; at-after , after, C2; att-alle , in every way, S2; at-foren , before, MD; et-foren , S; at-uore , S2; at-om , at home, S2, PP; at-on , at one, in accord, NED, S; at oon , G (s.v. oon ), C2; at-ones , at once, together, PP, C2, C3; attonis , S3; attonys , S3; attones , S3.
— from A Concise Dictionary of Middle English from A.D. 1150 to 1580 by A. L. (Anthony Lawson) Mayhew