Couth \Couth\ (k??th), imp. & p. p. of {Can}. [See {Can}, and
cf. {Uncouth}.]
Could; was able; knew or known; understood. [Obs.]
[1913 Webster]
Above all other one Daniel
He loveth, for he couth well
Divine, that none other couth;
To him were all things couth,
As he had it of God's grace. --Gower.
[1913 Webster]