showing extreme cupidity; painfully desirous of another's advantages; "he was never covetous before he met her"; "jealous of his success and covetous of his possessions"; "envious of their art collection"
concerned chiefly or only with yourself and your advantage to the exclusion of others; "Selfish men were...trying to make capital for themselves out of the sacred cause of civil rights"- Maria Weston Chapman
a certain degree of unwillingness; "a reluctance to commit himself"; "his hesitancy revealed his basic indisposition"; "after some hesitation he agreed"
(physics) opposition to magnetic flux (analogous to electric resistance)