From Proto-Berber *ta-ddar-t. Cognate with Kabyle taddart, Tarifit taddart and Tachawit taddarṭ. By surface analysis, ⴷⴷⵔ (ddr) + ⵜ- -ⵜ (t- -t).
ⵜⴰⴷⴷⴰⵔⵜ • (taddart) f