latitudinarian
Not restrained; not confined by precise limits.
Tolerant, especially of other people's religious views.
’Tis probable, that the Account here given of the Religion of the Natives of Madagascar, may, by Some, be thought a mere Fiction, and inserted with no other View, than to advance some Latitudinarian Principles […]
Lax in moral or religious principles.
Where it comes from
From Latin lātitūdin- + -arian, from oblique stem of Latin lātitūdō, from lātus + -tūdō. By surface analysis, latitude + -arian.
Adapted from the Wiktionary entry latitudinarian (CC BY-SA 4.0).