A.T. Robertson Commentary 2 Corinthians 8:14

"but by equality: your abundance [being a supply] at this present time for their want, that their abundance also may become [a supply] for your want; that there may be equality:" — 2 Corinthians 8:14 (ASV)

By equality (εξ ισοτητος). Old word from ισος, fair, equal. In N.T. only here and Col 4:1.

Abundancy (περισσευμα). Late word from περισσευω like περισσεια (verse 2) Cf. Matthew 12:34.

Want (υστερημα). Late word from υστερεω, to be in want. See also 9:12; Luke 21:4 (cf. υστερησις in Mr 12:44).