Vincent's NT Word Studies
14. Put them in remembrance (upomimnhske). o P. See on uJpomnhsin reminding, chapter.i. 5.Charging (diamarturomenov). In Paul only 1 Thess. iv. 6. Very frequent in Acts. See on Acts ii. 40; 20. 23. The sense is rather conjuring them by their loyalty to God. Paul uses the simple marturesqai in a similar sense. See Gal. v. 3; 1 Thess. ii. 12 (note); Ephesians iv. 17.
Before God (enwpion tou qeou). See on 1 Tim. v. 4.
Strive about words (logomacein). N.T.o . o LXX, o Class. Comp. logomaciav disputes of words, 1 Timothy. vi. 4, and see 1 Corinthians iv. 20.
To no profit (ejp' oujden crhsimon). Lit. to nothing useful. Ep' oujden, o P. He uses eijv kenon to no purpose. See 2 Cor. vi. 1; Gal. ii. 2; Philip. ii. 16; 1 Thess. iii. 5. Crhsimov useful, N.T.o . To the subverting (epi katastrofh). Epi does not mean here to or for (purpose or object). but indicates the ground on which the unprofitableness of the wordy strife rests. Unprofitable because it works subversion of the hearers. Katastrofh subversion, transliterated into catastrophe, only here and 2 Pet. ii. 6. In LXX of the destruction or overthrow of men or cities. Katastrefein to overturn, Matt. xxi. 12; Mark. xi. 15; Acts xv. 16, cit. Paul uses kaqairesiv pulling down, 2 Corinthians x. 4, 8; xiii. 10
Robertson's NT Word Studies
2:14 {That they strive not about words} (me logomacein). Word apparently coined by Paul from logomacia (#1Ti 6:4 which see), a back formation in that case. A mere war of words displeases Paul. (#Tit 3:9). {Useful} (cresimon). Late and rare word from craomai, here only in N.T. {To the subverting} (epi katastrofei). Old word (from katastrefw, to turn down or over), here only in N.T. (except #2Pe 2:6 in some MSS., not in Westcott and Hort)." Because of the overthrow" (result epi, not aim), useless for this reason. Such war of words merely upsets the hearers.