Ancient Greek λήθη

← Ancient Greek λανθάνω (mention)

← Proto-Hellenic *lā́tʰā (inherited)

← Proto-Indo-European *léh₂dʰeh₂ (inherited)

← Proto-Indo-European *leh₂- (mention)

→ English lethargic (mention)

→ English lethologica (borrowed)

→ Czech letargie (mention)

→ Greek λήθη (inherited)

→ Ancient Greek Λήθη (mention)

→ Ancient Greek λήθαργος (affix)

→ Indonesian letargi (mention)