When it comes to describing the act of taking small bites or eating in a hesitant, uncertain way, there are a variety of synonyms that can be used in place of "nibble at." Some common alternatives include "peck at," "pick at," "gnaw at," and "savor." Each of these words conveys a slightly different tone, with "peck at" suggesting a birdlike movement, "pick at" implying a more casual approach, "gnaw at" reflecting a stronger, more persistent action, and "savor" indicating a more conscious and appreciative way of eating. Depending on the context and desired tone, any of these synonyms could be used to convey the idea of nibbling or taking small bites.