Rationalize

Part of speech: verb (v.)

1. To make rational; also, to convert to rationalism.

2. To interpret in the manner of a rationalist.

3. To form a rational conception of.

4. To render rational; to free from radical signs or quantities.

Part of speech: verb (v.)

To use, and rely on, reason in forming a theory, belief, etc., especially in matters of religion: to accord with the principles of rationalism. Theodore . . . is just considered the chief rationalizing doctor of antiquity. J. H. Newman.