Merriam-Webster's Collegiate® Dictionary, 11th Edition
FEAT
I. noun see: do
Date: 14th century
act , deed ,
2. a deed notable especially for courage, an act or product of skill, endurance, or ingenuity, Synonyms: see: feat
II. adjective
Etymology: Middle English fete, fayt, from Anglo-French fait, past participle of faire
Date: 15th century
becoming , neat , smart , dexterous