koro
1. (noun) elderly man, grandfather, grandad, grandpa - term of address to an older man.
Tāwhia kia mau, kia ita i roto i te heketanga o te wānanga o ngā karakia o te kete tūātea i a koe, e koro, e! (JPS 1926:107) / Retain and hold firm, be steadfast in the inherited knowledge of the ritual chants of the art of magic that you possess, sir!