#1490 εἰ δὲ μήγἐ ei de me(ge) {i deh may'-(gheh)}

 from G1487, G1161, and G3361 (sometimes with G1065 added); TDNT - n/a; conj

—Greek Word Study (Transliteration-Pronunciation Etymology & Grammar)

 1) otherwise, but if not

—Thayer's (New Testament Greek-English Lexicon)

—Strong's (Greek Dictionary of the New Testament)

—NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries

 AV - or else 3, else 4, if not 2, if otherwise 2, if not 1,
      or else 1, otherwise 1; 14

—Exhaustive Concordance (KJV Translation Frequency & Location)