Question

synonyms or antonyms?
(if you are not familiar with a word that is listed, you are welcome to look up its definition online.)
a. certain, predictable
b. grueling, relaxing
c. enthrall, captivate
d. gruesome, pleasant
e. exuberant, unpleasant

Explanation:

1. For pair A: "certain" (definite, sure) and "predictable" (able to be foreseen) have nearly identical core meanings, so they are synonyms.
2. For pair B: "grueling" (extremely tiring/demanding) and "relaxing" (calming, restful) have opposite meanings, so they are antonyms.
3. For pair C: "enthrall" (hold attention completely) and "captivate" (charm and hold interest) have the same core meaning, so they are synonyms.
4. For pair D: "gruesome" (causing repulsion/fear) and "pleasant" (giving a sense of enjoyment) have opposite meanings, so they are antonyms.
5. For pair E: "exuberant" (full of energy/joy) and "unpleasant" (causing discomfort) have opposite meanings, so they are antonyms.

Answer:

A. certain, predictable → Synonyms
B. grueling, relaxing → Antonyms
C. enthrall, captivate → Synonyms
D. gruesome, pleasant → Antonyms
E. exuberant, unpleasant → Antonyms