Etymology
1. The adjective is borrowed from Scots dreich (“hard to bear, dreary, tedious, wearisome; interminable, long-winded; dull, uninteresting; slow, tardy; doleful, gloomy; baffling, difficult; difficult to reach, inaccessible”), from Middle English dregh, dri, drie (“burdensome; depressing, dismal; large, tall; lasting, long; long-suffering, patient; tedious; of blows: hard, heavy; of the face: unchanging, unmoved; of a person: strong, valorous”) [and other forms], from Old English *drēog, drēoh (“earnest; fit; sober”), and then probably partly:
2. * shortened from Old English ġedrēog (“calm, quiet; sober; fit, suitable”, adjective), from ġe- (prefix forming adjectives of association or similarity) + Proto-Germanic *dreugaz (“enduring, lasting”) (from *dreuganą (“to serve, be a retainer”), from Proto-Indo-European *dʰrewgʰ- (“to serve one’s tribe; loyal”)); and
3. * influenced by Old Norse drjúgr (“sufficient; excessive, very; great; strong”), from Proto-Germanic *dreugaz (see above).
4. The noun is probably partly derived:
5. * from the adjective; and
6. * borrowed from Scots dreich (“dreariness, gloom”) (rare), probably from Middle English dri, drie (“annoyance, trouble; grief; period of time”) [and other forms], possibly from dri, drie (adjective) (see above).
7. (Compare Old English ġedrēog (“seemliness; seriousness, sobriety; something appropriate or required”, noun), which did not survive into Middle English.)
8. Cognates
9. * German Low German drēg, drēge
10. * Icelandic drjúgur (“ample; heavy, substantial; long”)
11. * North Frisian drech
12. * Old Danish drygh (modern Danish drøj (“heavy; solid, tough”))
13. * Old Swedish drygher (modern Swedish dryg (“ample, liberal; hard; large; lasting”))
14. * Saterland Frisian drjooch
15. * Scots dreich
16. * West Frisian dreech, drege (“extensive; long-lasting”) See: Swedish Adjectives '
dryg'.