grandpan.
英 'græn(d)pɑː | 美 ˈɡrændˌpɑ
中文n. 爷爷；外公
词根词源
grandpa (n.)1814, shortening of grandpappa (1753), childish or familiar form of grandfather (see grand- + pa). Grandpappa is recorded from 1753, grandpop from 1860, grandpappy from 1853.
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