Antonyms of adj inappreciable

1 sense of inappreciable

Sense 1
inappreciable -- (too small to make a significant difference; "inappreciable fluctuations in temperature")

INDIRECT (VIA insignificant) -> significant, important -- (important in effect or meaning; "a significant change in tax laws"; "a significant change in the Constitution"; "a significant contribution"; "significant details"; "statistically significant")

Similarity of adj inappreciable

1 sense of inappreciable

Sense 1
inappreciable -- (too small to make a significant difference; "inappreciable fluctuations in temperature")
       => insignificant (vs. significant), unimportant -- (devoid of importance, meaning, or force)