The word "most reflecting" relates to something that strongly mirrors or represents a particular characteristic or trait. The antonyms for this phrase would be "least reflecting," "dull," "inaccurate," and "unrepresentative." Least reflecting implies that something has minimal or no reflection of a particular quality. Dull suggests a lack of shine or brilliance, which makes it hard for something to reflect. Inaccurate implies that something does not accurately represent the desired traits. Lastly, unrepresentative suggests that something is entirely lacking in reflecting the desired quality. By contrast, any of these words, when applied to a representation, would negate the strength of the reflection.