Multiple choice

Directions: Choose the word that best substitutes the following phrase.

That which cannot be solved

  1. Memorable

  2. Vandalism

  3. Perpetual

  4. Insoluble

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The word insoluble describes something that cannot be solved, dissolved, or resolved. Memorable means worth remembering, vandalism refers to deliberate damage to property, and perpetual means lasting forever. Thus, insoluble is the correct single-word substitute.