properest

adj

1. (form-of, nonstandard, superlative)superlative form of proper: most proper.

   ““Very probably,” answered Partridge; “but if the top of the hill be properest to produce melancholy thoughts, I suppose the bottom is the likeliest to produce merry ones, and these I take to be much the better of the two. […]”

   “[…] Mr. Rushworth discovered that the properest thing to be done, was for him to walk down to the Parsonage directly, and call on Mr. Crawford, and inquire whether Wednesday would suit him or not.”