skill
skil/
noun
noun: skill
the ability to do something well; expertise.
"difficult work, taking great skill"
synonyms:expertise, skillfulness, expertness, adeptness, adroitness, deftness, dexterity, ability, prowess, mastery, competence, capability, aptitude, artistry, virtuosity, talent"his skill as a politician"
antonyms:incompetence
Origin
late Old English scele ‘knowledge,’ from Old Norse skil ‘discernment, knowledge.’