Word Study
cosier (root: cosy)
CIDE DICTIONARY
cosier, n. [Cf. OF. coussier maker of mattresses; or couseor tailor, fr. OF. & F. coudre, p. p. cousu to sew, fr. L. consuere to sew together; con- + seure to sew. See Sew to stitch.].
A tailor who botches his work. Shak. [1913 Webster]
For further exploring for "cosier" in Webster Dictionary Online