The given root word above is the word "envy" and the rule that applies to this word is option C. Group III. The suffix -able always follows i. With the word envy, the last letter "y" should be changed to "i" then add a vowel suffix. In Group III, as stated, we change the "y" to "i" then add -able, so the word becomes "enviable" making it an adjective. Hope this helps!
Rule C - Group III: The suffix <em>“-able” </em>always follows <em>“i”</em>.
Explanation
When a word ends in <em>“y”</em>, such as <em>“envy”</em>, the <em>“y”</em> becomes an <em>“i”</em> when adding the suffix<em>“-able” </em>to make new adjectives. In this case, envy becomes enviable. There are other examples which exemplify this rule: justify - justifiable, or rely - reliable.
