Final answer:
The question seeks an adjective that describes an unpleasant or jarring quality similar to 'grating' or 'shrill,' or denotes disagreement like 'conflicting.' Terms like 'harmonious' and 'in agreement' serve as opposites to this concept.
Step-by-step explanation:
The synonyms provided such as grating, shrill, different, divergent, and conflicting all suggest adjectives that describe a harsh, piercing, or clashing quality, either in sound or in conceptual disagreement. The antonyms harmonious and in agreement indicate a pleasing, congruent, or compatible nature. These terms often pertain to descriptions of sensory experiences or opinions.
In the context provided, the adjective you are looking for likely describes an unpleasant or jarring sensation, as in the sentence: 'The noise of the cacophony shrilled throughout the town.' Or, it may refer to differences in perspective that are not necessarily harmonious, as suggested by conflicting opinions.