dextrous: [17] Just as the left hand has always been associated with awkwardness or maladroitness (cack-handed), so the right hand has traditionally been credited with skill: hence dextrous, a derivative of Latin dexter, which meant ‘on the right side’ and thus by extension ‘skilful’. This came ultimately, like Greek dexiós, Gothic taihswa, Breton dehou, Russian desnoj, and many other related forms in the general semantic area ‘right-hand side’, from an Indo-European base *dek-. English acquired the Latin adjective itself as a heraldic term in the 16th century.
