grand.fa.ther

grandfather的音标和读音：
DJ音标发音： [ˈgrændˌfɑ:ðə, ˈgræn-]
KK音标发音： [ˈgrændˌfɑðɚ, ˈgræn-]

grandfather的词性：
n.（名词）

1. The father of one's mother or father.
祖父，外公：某人母亲或父亲的父亲

2. A forefather; an ancestor.
祖宗；远祖

3. Computer Science A stored file of data from which two successive files have been derived, used for comparison with or as a backup copy for the newer files.
【计算机科学】 原始文件，原始数据组，祖父：一个已衍生出两个连续文件的数据储存文件， 用于和新文件作比较或作为更新文件的备份

grandfather的词性：
v.tr.（及物动词）

4. To exempt (one already involved in an activity or a business) from new regulations concerning that activity or business:
免受新法规限制：使（已涉入一项活动或事务中的人）排除在有关此种活动或事务的新法规之外：

The city passed an ordinance restricting the size of advertising signs, but grandfathered all those signs erected before 1982.
该市通过了一项限制广告牌规格的法令，但那些在1982 年以前竖起来的招牌免受限制

grandfather的词源：

5. V., from grandfather clause
动词，源自 grandfather clause