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 

lapse

noun. babe

A noun in The Etymologies of the 1930s glossed “babe” derived from the root ᴹ√LAP (Ety/LAP). The root was unglossed in The Etymologies, but in notes both before and after the 1930s this root had glosses like “enfold” and “fold”, so perhaps lapse meant something like “✱swaddled one”; hat-tip to Lokyt for this suggestion.

Cognates

  • N. lhaes “babe” ✧ Ety/LAP

Derivations

  • ᴹ√LAP “*babe” ✧ Ety/LAP

Element in

  • ᴺQ. lapselunga “pregnant, (lit.) baby-heavy”
  • ᴺQ. lapsarwa “pregnant, (lit.) baby-having”

Phonetic Developments

DevelopmentStagesSources
ᴹ√LAP > lapse[lapse]✧ Ety/LAP