Accroître belong to the 3rd
group. Accroître is a common french verb.
Accroître is conjugated the same way that verbs that end in : -oître
Accroître is conjugated with the two auxiliaries être
Accroître verb is
direct transitive, indirect transitive.
French verb accroître can be conjugated in the reflexive form: S'accroître
verb is a direct transitive verb, so passive voice can be used.
Attention: passive voice can only be used when accroître verb is conjugated with auxiliary avoir.