Which word provides the best context clue for the meaning of the word immeasurable?

Boiling

Explanation:

Immeasurable means that something cannot be weighed or measured. Therefore when something is denoted as being immeasurable, that means that it is impossible to achieve. For instance, the number of stars in the sky is immeasurable since we cannot ideally determine how they might be. Therefore the word incalculable has a close clue to the word immeasurable because they mean the same thing. It means you cannot define the quantity of something because it is too large to determine the exact number; therefore, it cannot be determined.