offer是什么意思,怎么形成的?

offer
KK:[]
DJ:[]
vt.
1.给予,提供;拿出,出示[O1][(+to)]
He offered me a glass of wine.
他端给我一杯酒.
2.愿意;试图(做某事);提议[Y][+to-v]
They offered to help me.
他们表示愿意帮助我.
He offered to lend me some books.
他表示要借给我几本书.
3.出(价);开(价)[O1]
We offered him the calculator for US$50.
这计算器我们向他开价五十美元.
4.贡献;奉献
vi.
1.提议
2.(机会等)出现
She travels whenever the opportunity offers.
她一有机会就去旅行.
3.献祭
n.[C]
1.提供,提议[(+of)][+to-v]
Thank you for your kind offer of help.
感谢你想给予帮助的好意.
2.出价;报价