immemorial

这个村庄的居民享有从远古时代流传下来的捕鱼权。

The villagers enjoy fishing rights that date from time ___immemorial.

从远古时代起，这条河流就被视为神圣的。

This river has been considered sacred since time ___immemorial.

该部落的仪式遵循着从远古时代确立的传统。

The tribe's rituals follow traditions established from time ___immemorial.