Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!

Qenya 

nulla

adjective. dark, dusky, obscure, hidden, secret
Qenya [Ety/DUL; Ety/NDUL; EtyAC/DUL] Group: Eldamo. Published by

lóna²

adjective. dark
Qenya [Ety/DOƷ] Group: Eldamo. Published by

laumea

adjective. dark, stormy
Qenya [QL/051] Group: Eldamo. Published by

lúrea

adjective. dark, overcast
Qenya [LT1A/Luvier; PME/057; QL/057] Group: Eldamo. Published by

lúvina

adjective. dark, overcast
Qenya [QL/057] Group: Eldamo. Published by

hui

noun. dark, murk, fog, night, evening
Qenya [LT1A/Fui; MC/214; MC/221; PE16/062; PE16/072; PE16/074; PE16/077; PE16/080; PME/038; PME/041; QL/034; QL/038; QL/041] Group: Eldamo. Published by

yanda

adjective. dark, gloomy
Qenya [QL/105] Group: Eldamo. Published by