Noah Webster
Skillful
SKILL'FUL, adjective
1. Knowing; well versed in any art; hence, dextrous; able in management; able to perform nicely any manual operation in the arts or professions; as a skillful mechanic; a skillful operator in surgery.
2. Well versed in practice; as a skillful physician.
It is followed by at or in; as skillful at the organ; skillful in drawing.