Both Uses

consonant
in
War and Peace
(Edited)

The naval officer spoke in a particularly sonorous, musical, and aristocratic baritone voice, pleasantly swallowing his r's and generally slurring his consonants: the voice of a man calling out to his servant, "Heah!"
Chpt 9 *

consonants = speech sounds that are not vowels
And yet it is difficult to imagine an historical character whose activity was so unswervingly directed to a single aim; and it would be difficult to imagine any aim more worthy or more consonant with the will of the whole people.
Chpt 15 *

consonant = in keeping

Definitions:

(1) (consonant as in: consonant or vowel?)
a letter of the alphabet (or a speech sound) that is not a vowel
(2) (consonant as in: in consonance with)
in keeping with (or consistent with, or in harmony with)
(3) (meaning too rare to warrant focus)