olive-branch
n
1 emblem of peace 橄榄枝（和平的象徵）.
2 (fig 比喻) thing said or done to show that one wishes to make peace with sb 与某人和解的言行
After years of quarrelling we at last sent our cousins a Christmas card as an olive-branch. 我们与堂兄弟多年不和, 最後我们送给他们一张圣诞卡, 算是化干戈为玉帛.