Antonyms of adj high-sounding

1 sense of high-sounding

Sense 1
high-flown, high-sounding, inflated -- (pretentious (especially with regard to language or ideals); "high-flown talk of preserving the moral tone of the school"; "a high-sounding dissertation on the means to attain social revolution")

INDIRECT (VIA pretentious) -> unpretentious -- (lacking pretension or affectation; "an unpretentious country church"; "her quiet unpretentious demeanor")

Similarity of adj high-sounding

1 sense of high-sounding

Sense 1
high-flown, high-sounding, inflated -- (pretentious (especially with regard to language or ideals); "high-flown talk of preserving the moral tone of the school"; "a high-sounding dissertation on the means to attain social revolution")
       => pretentious (vs. unpretentious) -- (making claim to or creating an appearance of (often undeserved) importance or distinction; "a pretentious country house"; "a pretentious fraud"; "a pretentious scholarly edition")