What does achate mean?
The definition of achate
Ach”ate, n.
An agate. [Obs.] Evelyn.
A*chate”, n.
Etym: [F. achat purchase. See Cates.]

1 Purchase; bargaining. [Obs.] Chaucer.
2 pl.
Provisions. Same as Cates. [Obs.] Spenser.