Step 1: Understanding the meaning of the word "Peeved."
"Peeved" means annoyed, irritated, or feeling angry.
Step 2: Analyzing each option:
\begin{itemize}
\item Gripe: To complain --- similar meaning, not opposite.
\item Vexed: Annoyed or worried --- similar meaning, not opposite.
\item Delighted: Very pleased or happy --- opposite of annoyed.
\item Miffed: Slightly angry or offended --- similar meaning, not opposite.
\end{itemize}
Thus, the correct opposite of "Peeved" is Delighted.