The Collaborative International Dictionary
Archi- \Ar"chi-\ [L., archi-, Gr. 'archi-, a prefix which is from the same root as 'a`rchein to be first, to begin; 'archh the first place, beginning; 'archo`s chief. Cf. AS. arce-, erce-, OHG. erzi-, G. erz-.] A prefix signifying chief, arch; as, architect, archiepiscopal. In (Biol.) and (Anat.) it usually means primitive, original, ancestral; as, archipterygium, the primitive fin or wing. [1913 Webster] ||
Wiktionary
pre. 1 chief, highest, most important 2 earlier, primitive
Usage examples of "archi-".
But a group of thirty brilliant and altruistic souls of the Archi-magical College, including the great Varcour, decided to remain and do what they could to repair the terrible damage that humanity had caused.
When the Archi-mage materialized in the boat between the Lady of the Eyes and Jagun and calmly erected a magical umbrella against the pouring rain, Kadiya stared at her sister in speechless chagrin.
The Archi-mage had extended her protective aura about them with little difficulty.