Icelandic
Noun
þræll m (genitive singular þræls, nominative plural þrælar)
-  a slave
Declension
declension of þræll
| m-s1 | singular | plural | 
|  | indefinite | definite | indefinite | definite | 
| nominative | þræll | þrællinn | þrælar | þrælarnir | 
| accusative | þræl | þrælinn | þræla | þrælana | 
| dative | þræl | þrælnum | þrælum | þrælunum | 
| genitive | þræls | þrælsins | þræla | þrælanna | 
 
 
See also
 
Old Norse
Etymology
From Proto-Germanic *þragilaz, *þrahilaz, *þrēhilaz, cognate with Old High German drigil (“servant”) and Gothic 𐌸𐍂𐌰𐌲𐌾𐌰𐌽 (þragjan, “to run”). From the root *þreh-, *þreg-, *þrag- ‘to run’, from Proto-Indo-European *trāgʰ- (“pull, drag, race, run”).
Noun
þræll m (genitive þræls, plural þrælar)
-  slave
Declension
  Declension of þræll (strong a-stem)
| masculine | singular | plural | 
| indefinite | definite | indefinite | definite | 
| nominative | þræll | þrællinn | þrælar | þrælarnir | 
| accusative | þræl | þrælinn | þræla | þrælana | 
| dative | þræli | þrælinum | þrælum | þrælunum | 
| genitive | þræls | þrælsins | þræla | þrælanna | 
 
 
Descendants
| 
 Danish: træl c (Old Danish: thræl) Faroese: trælur m, trællur m
 Icelandic: þræll m
 Irish: tráill
 Middle Low German: drelle (loanword) |  | 
 Norwegian (bokmål): trell m
 Norwegian (nynorsk): træl m
 Old English: þrǣl m (loanword) Scottish Gaelic: tràill
 Swedish: träl c (Old Swedish þræl) |