There was a time when it was regarded as axiomatic that the earth is flat.
We take as axiomatic our rights as Americans.
It's axiomatic to say that life is not always easy.
This, in an elementary treatment of the subject, must be regarded as axiomatic; but it is really a simple case of mathematical induction.
Treating this rule as axiomatic the Schoolmen elaborated their analyses of the sacrament of penance, distinguishing form and matter, attrition and contrition, mortal and venial sins.