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i need a little help again my friends!
1dwn,momentous,?i?t?r?c,(historic)??
11dwn,settlement of a quarrel,?e?o?r?l?a?i?n
40dwn,relishing a challenge,?o???t?????.
63acc, thankless, u?e???a???.60acc,pushing force,??r???. anyone please,xx

settlement of a quarrel- looks like "reconciliation"?

Pushing force- thrust?

relishing a challenge- combatative?

40d.Competitive
63a.Unenviable

Competitive is the right answer, I think,
"Combatative" seems to be used on only one side of the Atlantic