particle

nē

Greekνή (nē)

Strong’sG3513

swearing by

stem n-once in the New Testament

Translated as

that is as certain1×

What it means

νή,

particle of affirmation employed in oaths,

[in LXX: ν. τ. ὑγίειαν, Ge 42:15, 16 (חֵי)*;]

by: c. acc., I Co 15:31.†

G. Abbott-Smith, A Manual Greek Lexicon of the New Testament, 1922 — public domain. References open in the reader.

Strong’s G3513 — the 1890 definition, and where the word comes from

Saidnay

a particle of attestation (accompanied by the object invoked or appealed to in confirmation); as sure as

Fromprobably an intensive form of G3483;

King JamesI protest by.

James Strong, Exhaustive Concordance of the Bible, 1890 — public domain. The numbers in it link to the entries here.

Every form

This word never changes. It is spelled the same wherever it appears, so there is nothing to learn beyond the word itself.

Where it appears

1 occurrence, every one of them listed

nē1×

1 Corinthians 15:31“that is as certain”kata hēmeran apothnēskamō, nē tan humeteran kauchēsian, han echamō en Christo Iēso to kurio nu.I face death every day, brothers, as surely as I boast about you in Christ Jesus our Lord.