Harrowingly pervasive

An entertaining work mate of mine who professes to be a writer had not any idea what timbre was with respect to a person's voice.

timbre
noun
1. Acoustics, Phonetics . the characteristic quality of a sound, independent of pitch and loudness, from which its source or manner of production can be inferred. Timbre depends on the relative strengths of the components of different frequencies, which are determined by resonance.
2. Music. the characteristic quality of sound produced by a particular instrument or voice; tone color.

My explanation of timbre was not as eloquent (tone color) as dictionary.com, but then, who has that mental connection to the internet that would allow for such instantaneous eloquence?

I think the most important word in the definition of timbre above is resonance. There is no doubt that someone whose voice has a rich timbre has a voice that resonates.

resonate
verb (used without object)
1. to resound.
2. to act as a resonator; exhibit resonance.
3. Electronics. to reinforce oscillations because the natural frequency of the device is the same as the frequency of the source.
4. to amplify vocal sound by the sympathetic vibration of air in certain cavities and bony structures.

I had succumbed to a cold of some sort over the last five or seven days, I'm mostly better now. There was a time, during the span of this cold, that my voice was altered with an improved timbre. My altered voice preceded the conversation I allude to in the opening sentence of this post.

Well, that about sums up the least parenthetical aptitude that is equanimous with a pervasive harrow.