Among the words you've listed, "mute" and "wicked" are likely to evoke a sense of anxiety when repeated in a poem.
-
"Mute" can imply silence, absence, or a lack of communication, which can create a feeling of isolation or tension.
-
"Wicked" has connotations of evil or harm, and repeating it could evoke a sense of danger or malevolence.
While "truth" is a strong word, it doesn't inherently carry the same anxious undertones as "mute" or "wicked." Repeated references to "truth" might elicit contemplation but are less likely to create an edge of anxiety.
So, "mute" and "wicked" are the stronger candidates for putting readers on edge.