Fléchir belong to the 2
nd group. Fléchir is a common french verb.
Fléchir is conjugated the same way that verbs that end in :
-ir
Fléchir is conjugated with
auxiliary avoir.
Fléchir verb is
direct transitive, intransitive.
French verb fléchir can be conjugated in the reflexive form:
Se fléchir
Fléchir verb is a direct transitive verb, so passive voice can be used.