From Middle English daggere, probably adapted from Old French dague (1229), related to Occitan, Italian, Spanish daga, Dutch dagge, German Degen, Middle Low German dagge (“knife's point”), Old Norse daggardr, Welsh dager, dagr, Breton dac, Albanian thikë (“a knife, dagger”), thek (“to stab, to pierce with a sharp object”).
In English attested from the 1380s. The ultimate origin of the word is unclear. Grimm suspects Celtic origin. Others have suggested derivation from an unattested Vulgar Latin *daca "Dacian [knife]", from the Latin adjective dācus. Chastelain (Dictionaire etymologique, 1750) thought that French dague was a derivation from German dagge, dagen, although not attested until a much later date).
The knightly dagger evolves from the 12th century. Guillaume le Breton (died 1226) uses daca in his Philippide. Other Middle Latin forms include daga, dagga, dagha, dagger, daggerius, daggerium, dagarium, dagarius, diga; the forms with -r- are late 14th century adoptions of the English word). OED points out that there is also an English verb dag (“to stab”) from which this could be a derivation, but the verb is attested only from about 1400.
dagger (plural daggers)
- (weaponry) A stabbing weapon, similar to a sword but with a short, double-edged blade.
- 1786, Francis Grose, A Treatise on Ancient Armour and Weapons, page 34:
- The dagger, under the title cultellum and misericorde, has been the constant companion of the sword, at least from the days of Edward I. and is mentioned in the statute of Winchester.
- (typography) The text character †; the obelus.
- (basketball, American football) a point scored near the end of the game (clutch time) to take or increase the scorer's team lead, so that they are likely to win
- Curry's last-minute 3-point dagger silenced the criticism for his so-called failure to come up big in big moments.
- (stabbing weapon): dirk, knife
- (text character): obelisk, obelus
- (anything that causes pain like a dagger) barb
- The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Wiktionary:Entry layout#Translations.
- To pierce with a dagger; to stab.
Perhaps from diagonal.
dagger (plural daggers)
- A timber placed diagonally in a ship's frame.
- (Can we find and add a quotation of Knight to this entry?)