Conversant

It is not of the essence of mathematics to be conversant with the ideas of number and quantity.

VVe (of all earthlings) are Gods vtmoſt ſubiects, the laſt (in a manner) that he bought to his obedience: ſhal we then forgette that vvee are any ſubiects of hys, becauſe (as amongſt his Angels) he is not viſibly conuerſant amongſt vs?

She is equally conversant with Shakespeare and the laws of physics.

We ſee in all things how deſuetude do's contract and narrow our faculties, ſo that we may apprehend only thoſe things wherein we are converſant.

c. 1694, John Dryden, letter to Mr. John Dennis deeply conversant in the Platonic philosophy

1720, Thomas Parnell, corrected by Alexander Pope, "Essay on Homer", published with Pope's translation of the Iliad He uses the different dialects […] as one who had been conversant with them all.

If any think education, because it is conversant about children, to be but a private and domestick duty, he has been ignorantly bred himself.

Their Ideas are perpetually converſant in Lines and Figures. If they would, for example, praiſe the Beauty of a Woman, or any other Animal, they deſcribe it by Rhombs, Circles, Parallelograms, Ellipſes, and other Geometrical Terms, or by Words of Art drawn from Muſick, needleſs here to repeat.