"With unaccustomed fingers" refers to the state of being unfamiliar or inexperienced with a task. Some synonyms for this phrase include "with inexperienced hands," "with unpracticed digits," "with unwieldy appendages," or "with clumsy touch." These phrases all convey a sense of awkwardness or unfamiliarity with a particular activity or object. They also imply the need for practice or further experience to become more comfortable with the task at hand. Whether it's learning a new skill or adapting to a new environment, using these synonyms for "with unaccustomed fingers" can help add variety and richness to your writing, while still conveying the same message.