Quick Definition
κατακαυχάομαι v. I boast against
Strong's Definition
from 2596 and 2744; to exult against (i.e. over)
KJV Usage: boast (against), glory, rejoice against
UBS Dictionary of the Greek New Testament
verb | impv.2sg. κατακαυχῶ | καυχάομαι
33.370 · Communication · Boast
to boast against, to degrade to boast about something by downgrading something else In many languages it may not be possible to use an expression such as ‘to boast against.’ Therefore, in rendering μὴ κατακαυχῶ τῶν κλάδων in ROM 11:18 one may use ‘you must not say that you are so much better than the branches.’ For another interpretation of κατακαυχάομαι in ROM 11:18, see 88.194.
88.194 · Moral and Ethical Qualities and Related Behavior · Despise, Scorn, Contempt
to despise, to look down on to despise, with the implication of regarding oneself as superior For another interpretation of κατακαυχάομαι in ROM 11:18, see 33.370.
74.11 · Able, Capable
to be more powerful than, to triumph over to have greater power or potential than The reference to ‘mercy’ and ‘judgment’ in JAS 2:13 must be related to God’s mercy and judgment.
In a number of languages it is not possible to personify mercy and judgment, and therefore one must relate these two expressions to God, for example, ‘the extent to which God shows mercy is even more than the way in which he judges’ or ‘God shows mercy even more than he judges.’
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
κατα-καυχάομαι, -ῶμαι, 2 pers. sing. κατακαυχᾶσαι (contr. fr. κατακαυχάεσαι) for the Attic κατακαυχᾷ (Ko. xi. 18; cf. W.§13, 2b.; [B. 42 (37); Soph. Lex., Introd. p. 40 sq.; Τα Proleg. p. 123 sq.]; Lob. ad Phryn. p. 360), impy. 2 pers. sing. κατακαυχῶ (Ro. xi. 18); (κατά against [ef. κατά, II. 177); prop. to glory against, to exult over, to boast one’s self to the injury of (a person or a thing): τινός, Ro. xi. 18; Tdf. in Jas. iii. 14; κατά τινος, ibid. RG LTr WH [B. 185 (160); W. § 30, 9 b. (ef. 432 (402))]; devs (ig. ὁ ἐλεῶν) κατακαυχᾶται κρίσεως, mercy boasts itself superior to judement, i. e. full of glad confidence has no fear of judgment, Jas. ii. 13. (Zech. x. 12; Jer. xxvii. (4. 10, 38; not found in prof. auth.)
Mounce Concise Greek Dictionary
κατακαυχάομαι katakauchaomai 4x
to boast, glory over, assume superiority over, Rom. 11:18 (2x); Jas. 2:13; 3:14*
Abbott-Smith Greek Lexicon
† κατα-καυχάομαι, -ῶμαι,
[in LXX: Za 10:12 (הלךְ hith.), Je 27 (50):11 (עלז), Je 27 (50):38 (הלל)*;]
to boast against, exult over: c. gen., Ro 11:18, Ja 2:13; seq. κατά, c. gen., Ja 3:14 (T, om. κατά).
seq. ἐν, to glory in (Za 10:12, Je 27:38).†
Liddell-Scott-Jones — Greek-English Lexicon
κατακαυχάομαι (katakauchaomai) — to boast. κατακαυχάομαι, boast against one, exult over him, τινος [NT+5th c.BC+]; κ. ἔν τινι to glory in it, [LXX]