Learn how to say Sephiroth correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word sephira:
noun (plural sephiroth /ˈsɛfɪrəʊθ/)
(in the Kabbalah) each of the ten attributes or emanations surrounding the infinite and by means of which it relates to the finite. They are represented as spheres on the Tree of Life.
from Hebrew sĕp̱īrāh