Old French - Etymology 1
This verb conjugates as a first-group verb ending in -ier, with a palatal stem. These verbs are conjugated mostly like verbs in -er, but there is an extra i before the e of some endings. The forms that would normally end in *-c, *-cs, *-ct are modified to z, z, zt. In addition, c becomes ç before an a, o or u to keep the /ts/ sound intact. Old French conjugation varies significantly by date and by region. The following conjugation should be treated as a guide.
- French: chausser