Choose two words, one from each group, that are most opposite in meaning.(deafeningcooperatepromoted)(utiliseavertmuffled)

The two words that are most opposite in meaning are "deafening" from the first group and "muffled" from the second group.

Step 1: Look at the words in the first group: deafening, cooperate, promoted. "Deafening" refers to a very loud noise, while "cooperate" and "promoted" do not refer to sounds at all.

Step 2: Look at the words in the second group: utilise, avert, muffled. "Muffled" refers to a sound that is not clear or loud, while "utilise" and "avert" do not refer to sounds.

Step 3: Compare the meanings of "deafening" and "muffled". "Deafening" means very loud, while "muffled" means not loud or clear. Therefore, these two words are most opposite in meaning.