ability: the quality of being able to perform; a quality that permits or facilitates achievement or accomplishment
apply: put into service; make work or employ for a particular purpose or for its inherent or natural purpose
background: the part of a scene (or picture) that lies behind objects in the foreground
confidence: freedom from doubt; belief in yourself and your abilities
expert: a person with special knowledge or ability who performs skillfully
hesitant: lacking decisiveness of character; unable to act or decide quickly or firmly
application: the action of putting something into operation