"Grandmother" and "grandfather" in Engpsh are typically pronounced as "grændmɑːðər" and "grændfɑːðər" respectively.
These words come from the Old Engpsh words "grān-feðer" and "grān-moder" which means "grandfather" and "grandmother" respectively.
Examples:
"I love spending time with my grandparents." (我喜欢和我的祖父母一起度过时光。)
"My grandmother taught me how to knit." (我奶奶教我怎么编织。)
"My grandfather always tells me stories about his youth." (我爷爷总是给我讲他年轻时的故事。)