"Harmonicalness" is a rare noun that describes the quality or state of being harmonious. It is pronounced /hɑːˈmɒn.ɪ.kəl.nəs/ (hah-MON-ih-kuhl-ness) and follows the spelling convention for English words ending in "-ness", derived from the Middle English suffix "-nesse". The word "harmonical" derives from the noun "harmony" and the suffix "-al", indicating a relation to or possession of the quality. While not commonly used, "harmonicalness" can be employed to succinctly express the concept of harmoniousness, especially in the context of music or acoustics.
The word "harmonicalness" is not found in the English language. It appears to be a formed by combining the word "harmonical" with the suffix "-ness". The etymology of "harmonical" can be traced back to the Greek word "harmonikos", meaning "fitting" or "harmonious". The suffix "-ness" is a productive suffix used to form abstract nouns indicating a quality or state. Therefore, "harmonicalness" would imply the state or quality of being harmonical, although the word itself is not commonly used or recognized.