[dugan], v., to avail, to be capable, to be good: pres. sg. III. hûru se aldor deáh, especially is the prince capable, [369]; ðonne his ellen deáh, if his strength avails, is good, [573]; þe him selfa deáh, who is capable of himself, who can rely on himself, [1840]; pres. subj. þeáh þîn wit duge, though, indeed, your understanding be good, avail, [590]; similarly, [1661], [2032]; pret. sg. þu ûs wel dohtest, you did us good, conducted yourself well towards us, [1822]; similarly, nu seó hand ligeð se þe eów welhwylcra wilna dohte, which was helpful to each one of your desires, [1345]; pret. subj. þeáh þu heaðoræsa gehwær dohte, though thou wast everywhere strong in battle, [526].
[duguð] (state of being fit, capable), st. f.: 1) capability, strength: dat. pl. for dugeðum, in ability(?), [2502]; duguðum dêmdon, praised with all their might(?), [3176].—2) men capable of bearing arms, band of warriors, esp., noble warriors: nom. sg. duguð unlytel, [498]; duguð, [1791], [2255]; dat. sg. for duguðe, before the heroes, [2021]; nalles frätwe geaf ealdor duguðe, gave the band of heroes no treasure (more), [2921]; leóda duguðe on lâst, upon the track of the heroes of the people, i.e. after them, [2946]; gen. sg. cûðe he duguðe þeáw, the custom of the noble warriors, [359]; deórre duguðe, [488]; similarly, [2239], [2659]; acc. pl. duguða, [2036].—3) contrasted with geogoð, duguð designates the noted warriors of noble birth (as in the Middle Ages, knights in contrast with squires): so gen. sg. duguðe and geogoðe, [160]; gehwylc ... duguðe and iogoðe, [1675]; duguðe and geogoðe dæl æghwylcne, [622].
[durran], v. pret. and pres. to dare; prs. sg. II. þu dearst bîdan, darest to await, [527]; III. he gesêcean dear, [685]; pres. subj. sêc gyf þu dyrre, seek (Grendel's mother), if thou dare, [1380]; pret. dorste, [1463], [1469], etc.; pl. dorston, [2849].
[duru], st. f., door, gate, wicket: nom. sg., [722]; acc. sg. [duru], [389].
ge-[dûfan], st. v., to dip in, to sink into: pret. þät sweord gedeáf (the sword sank into the drake, of a blow), [2701].
þurh-dûfan, to dive through; to swim through, diving: pret. wäter up þurh-deáf, swam through the water upwards (because he was before at the bottom), [1620].
[dwellan], w. v., to mislead, to hinder: prs. III. nô hine wiht dweleð, âdl ne yldo, him nothing misleads, neither sickness nor age, [1736].
[dyhtig], adj., useful, good for: nom. sg. n. sweord ... ecgum dyhtig, [1288].
[dynnan], w. v., to sound, to groan, to roar: pret. dryhtsele (healwudu, hruse) dynede, [768], [1318], [2559].
[dyrne], adj.: 1) concealed, secret, retired: nom. sg. dyrne, [271]; acc. sg. dryhtsele dyrnne (of the drake's cave-hall), [2321].—2) secret, malicious, hidden by sorcery: dat. instr. sg. dyrnan cräfte, with secret magic art, [2291]; dyrnum cräfte, [2169]; gen. pl. dyrnra gâsta, of malicious spirits (of Grendel's kin), [1358].—Comp. un-dyrne.