consonant (adj) – in agreement or harmony; corresponding in sound
BREAKDOWN: CON- (with) + SON- (sound) + -ANT (state or quality)
— a consonant is a speech sound that is not a vowel
— consonance is agreement or harmony
This word is built on the root SON-, which means sound.
Common SON- words include sonar, sonic, and sound.
More esoteric SON- words include assonant, sonata, soniferous, and sonnet.