Reconstruction:Proto-Germanic/lustuz

A tu-stem nominal formation from a root *lus-, whose further origin is disputed:^[1]

• Traditionally derived from Proto-Indo-European *leh₂s- (“to be eager”), and compared with Ancient Greek λῐλαίομαι (lĭlaíomai, “to desire, long for”), Latin lascīvus (“wanton, lustful, lascivious”), Old Irish lainn (“avaricious”), Proto-Slavic *lasъ (“greedy, eager”), Lithuanian lokšnùs (“sensitive”). However, this assumes an awkward secondary zero-grade form of *lh₂s- for the Germanic and all potential cognates except the Balto-Slavic.
• Possibly derived from *leusaną (“to lose, empty”) +‎ *-þuz, with semantic shift "lost, empty" > "idle" > "frivolous" > "lustful". In this case, ultimately from Proto-Indo-European *lewH- (“to separate, loosen, release”). This derivation is tentatively favored by Kroonen.

• IPA^(key): /ˈlus.tuz/

*lustuz m^[1]

1. lust, desire, want

• *lustijaną
• *lustusamaz
• *unlustuz

• Proto-West Germanic: *lustu
  • Old English: lust
    • Middle English: lust
      • Scots: lust
      • English: lust
  • Old Frisian: lust
    • Saterland Frisian: Lust
    • West Frisian: lust
  • Old Saxon: lust
    • Middle Low German: lust, lüst, lyst
      • German Low German: Lüst
      • → Old Norse: lyst
        • Icelandic: lyst
        • Norwegian: lyst
        • Danish: lyst
        • Faroese: lyst
        • Old Swedish: lyst
          • Swedish: lust
      • → Estonian: lust
  • Old Dutch: *lust
    • Middle Dutch: lust
      • Dutch: lust
        • Afrikaans: lus
        • Negerhollands: lyst
  • Old High German: lust
    • Middle High German: lust
      • German: Lust
      • Luxembourgish: Loscht
• Old Norse: losti
  • Icelandic: losti
  • Faroese: losti
  • Old Swedish: luste
• Gothic: 𐌻𐌿𐍃𐍄𐌿𐍃 (lustus)