Correct spelling for the English word "Intelligency" is [ɪntˈɛlɪd͡ʒənsi], [ɪntˈɛlɪdʒənsi], [ɪ_n_t_ˈɛ_l_ɪ_dʒ_ə_n_s_i] (IPA phonetic alphabet).
The word "intelligency" is a noun derived from the adjective "intelligent", which in turn comes from the Latin word "intelligentia". The Latin term "intelligentia" means "understanding, knowledge, intelligence", and is derived from the verb "intelligere", meaning "to understand, comprehend". The word "intelligence" originates from the Latin root "intellegentia", which is a composite of "inter" (between) and "legere" (to choose, select, read). Therefore, "intelligency" ultimately evolved from Latin and has a root meaning related to understanding or knowledge.