1) Blame 2) Blamed 3) Blasted 4) Blessed 5) Cursed 6) Curst 7) Damn 8) Damned 9) Darned 10) Deuced 11) Everlasting 12) Extremely 13) Goddamn 14) Goddamned 15) Infernal 1) Blame 2) Blamed 3) Cursed 4) Curst 5) Damned 6) Darned 7) Deuced 8) Goddamned 
Dates from the Hundred Years War, French nickname for the British troops taken from their extensive use of the expression.
[adv] - (intensifier) extremely
goddamn adverb extremely; `you are goddamn right!`