tētehi atu
1. (particle) another, some other, someone else - variation used in Western dialects of tētahi atu.
He tino whānui rawa atu te mōhio o Te Kāhui ki ngā tikanga ā-iwi o Taranaki me te rerenga kētanga o te whakahua o te reo o tētehi iwi i tō tētehi atu (TTR 1996:216). / Te Kahui had a wide knowledge of Taranaki traditions and of dialectal variation between tribes.
