couth 1
/koohth/ , Facetious.
adj.
1. showing or having good manners or sophistication; smooth: Sending her flowers would be a very couth thing to do.
n.
2. good manners; refinement: to be lacking in couth.
[ 1895-1900; back formation from UNCOUTH ]
couth 2
/koohth/
adj. Archaic. known or acquainted with.
[ bef. 1000; ME, OE cuth ptp. of cunnan to KNOW (see CAN 2 , COULD) ]