Antonyms of adj measurable

2 senses of measurable

Sense 1
measurable (vs. immeasurable), mensurable -- (capable of being measured; "measurable depths")

immeasurable (vs. measurable), unmeasurable, immensurable, unmeasured -- (impossible to measure; "unmeasurable reaches of outer space")
        => abysmal -- (very great; limitless; "abysmal misery"; "abysmal stupidity")
        => illimitable, limitless, measureless -- (without limits in extent or size or quantity; "limitless vastness of our solar system")

Sense 2
measurable -- (of distinguished importance; "a measurable figure in literature")

INDIRECT (VIA important) -> unimportant -- (not important; "a relatively unimportant feature of the system"; "the question seems unimportant")

Similarity of adj measurable

2 senses of measurable

Sense 1
measurable (vs. immeasurable), mensurable -- (capable of being measured; "measurable depths")

Sense 2
measurable -- (of distinguished importance; "a measurable figure in literature")
       => important (vs. unimportant), of import -- (of great significance or value; "important people"; "the important questions of the day")