The Latin word avus
Word avus
Transliteration avus
Meaning grandfather
See also Cappadocian Greek: αβούκα ‘grandfather’

Other words that might be of interest
levir ‘brother in law’, fēmina ‘woman’, vir ‘man’, homō ‘man, human being’, puer ‘child’, uxor ‘wife’, mulier ‘wife’, maritus ‘husband’, māter ‘mother’, pāter ‘father’, abbas ‘father’, atavus ‘great grandfather, ancestor’, glōs ‘sister in law’, nepōs ‘grandson, nephew’