"The lesson"

Translation: Y wers

[deactivated user]

"y gwers" was wrong, why does the letter G vanish?

[ibisc]

This is due to a soft mutation, where the initial g- vanishes. Y ('the') causes weak soft mutation of feminine nouns. Gwers is a feminine noun.

'Weak' soft mutation means that words beginning with the letters ll- or rh- resist the mutation.