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 

leo

noun. shade, shadow cast by any object

A noun in The Etymologies of the 1930s glossed “shade, shadow cast by any object” from primitive ᴹ✶daı̯ō under the root ᴹ√DAY “shadow” (Ety/DAY; EtyAC/DAY). This root was primarily used for N. dae “shadow” in N. Dor-Daedeloth “Land of the Shadow of Dread”; in later writings the Dae- element in that name seems to have become dae(r) “great” (WJ/183), so I suspect ᴹ√DAY “shadow” and its derivatives were abandoned.

Cognates

  • N. dae “shadow (cast by an object or form), shade” ✧ Ety/DAY

Derivations

  • ᴹ✶daiō “shade, shadow cast by any object” ✧ Ety/DAY
    • ᴹ√DAY “shadow” ✧ Ety/DAY; EtyAC/DAY

Phonetic Developments

DevelopmentStagesSources
ᴹ✶daı̯ō > leo[dajō] > [lajō] > [leo]✧ Ety/DAY