Final answer:
The root in 'automatic' is 'auto', in 'gratify' is 'grat', and in 'untenable' is 'ten', which help in understanding the meanings of these words.
Step-by-step explanation:
To identify the root in each difficult word, let's look at the words: Automatic, Gratify, and Untenable. The root of the word automatic is auto, which means 'self' or 'same'. The root of the word gratify is grat, which comes from the Latin gratus, meaning 'pleasing' or 'thankful'. Lastly, the root of the word untenable is ten, derived from the Latin tenere, meaning 'to hold'. By understanding these roots, we can deduce the overall meaning of the words. Automatic relates to something that operates by itself, gratify refers to the act of pleasing someone, and untenable describes a position that is not capable of being held or defended.