Tukukkk

Ephesians 4:4-6 (MLVBL)

There is one ^ἓν body and one ^ἓν Spirit, just-as you were also called in one ^μιᾷ hope of your calling; one ^εἷς Lord, one ^μία faith, one ^ἓν immersion, one ^εἷς God and Father of all, who is over all and through all and in us all.

1. Why the various Greek words, ἓν/μιᾷ/εἷς, for "one"?




2. How many religious faiths are right according to Ephesians 4:4-6?

All the words for "one" are different declensions of the same word (εἷς, μία, ἕν in the lexicon). It is declined to match the noun it modifies.

ἓν - is nominative neuter singular

μιᾷ - is dative feminine sigular (in a prepositional phrase)

εἷς - is nominative masculine singular

μία - is nominative feminine sigular

There are sites like the following where you can get free classes in Biblical Greek:

https://www.biblicaltraining.org/biblical-greek/william-mounce

As for the religious faiths Eph. 4:4-6 applies, it applies for all Christians.

Unlike English, Greek is a heavily inflected language. In English, one could say, “One Lord, one faith, one baptism,” and the word “one” does not change spelling according to the noun it modifies. In Greek, on the other hand, εἷς (dictionary form; lemma) declines according to:

1. Case
   
   
   
   • Nominative
   
   
   • Genitive
   
   
   • Dative
   
   
   • Accusative
   
   
   • Vocative
   
   
   
   


2. Gender
   
   
   
   • Masculine
   
   
   • Feminine
   
   
   • Neuter
   
   
   
   

Since εἷς is an adjective, when you find its entry in a lexicon, the lexicon will give you its declension for the masculine, feminine, and neuter genders, all in nominative case, singular number.

You will have to learn the basics of Greek to learn how adjectives decline (i.e., generally, how their endings change) according to case, number, gender, as well as degree (positive/comparative/superlative), in order to learn the rest of the declensions that a lexicon will not provide you.