e'-ther, i'-ther:

Often in the sense still common, "one or the other" (1 Chronicles 21:21; Matthew 6:24, etc.), but also in the obsolete sense of "both" or "each" (Leviticus 10:1; 1 Kings 7:15; John 19:18; Revelation 22:2), or in place of (Revised Version) "or" (Luke 6:42; 15:8; Philippians 3:12; James 3:12).

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Bibliography Information
Orr, James, M.A., D.D. General Editor. "Entry for 'EITHER'". "International Standard Bible Encyclopedia". 1915.