Complete the Palindrome, "dennis and Edna __"

This page is the CodyCross answer for the clue below from Futuristic City , Group 987, Puzzle 3 (Voice Identification).

Question is: Complete the Palindrome, "dennis and Edna __"

and the answer is: SINNED

Word Meaning:

SINNED — simple past and past participle of sin

Definitions from Wiktionary.