leaden in WordNet English dictionary

1. darkened with overcast
   "a dark day"; "a dull sky"; "the sky was leaden and thick"
   dull  leaden 
   
2. lacking lightness or liveliness
   "heavy humor"; "a leaden conversation"
   heavy  leaden 
   
3. made of lead
   "a leaden weight"
   leaden 
   
4. (of movement) slow and laborious
   "leaden steps"
   leaden  plodding 
   
5. made heavy or weighted down with weariness
   "his leaden arms"; "weighted eyelids"
   leaden  weighted