- Original: νεφρός - Transliteration: Nephros - Phonetic: nef-ros' - Definition: 1. a kidney 2. kidneys, loins a. used of the inmost thoughts, feelings, purposes, of the soul - Origin: of uncertain affinity - TDNT entry: 19:11,6 - Part(s) of speech: Noun Masculine - Strong's: Of uncertain affinity; a kidney (plural) that is (figuratively) the inmost mind: - reins.