Question

According to the word entry, which syllable is stressed in the word retribution?

ret•ri•bu•tion (re-trə-ˈbyü-shən) n. 1: Something justly deserved; repayment. 2: Something given or demanded in reparation, especially punishment. [Middle English retribucioun, from Old French retribution, from Latin retribuere, to pay back.]

Answer 1

the answer is the third syllable

Answer 2

According to the word entry, the third syllable is stressed in the word retribution.
When determining where the stress is in a word, just look at its dictionary definition. You will see the word divided into syllables in the brackets, and the stressed syllable will have an apostrophe in front of it (like the third syllable, ˈbyü, has in this case).