This is how you sign Diligent in American Sign Language.
Learn how to sign "diligent" in American Sign Language(ASL). Initiate by shaping fists with both hands, extending the index and middle fingers at a 90-degree angle from the palm, thus forming the 'K' handshape in ASL, with thumbs positioned at the intersection of the index and middle fingers. Next, place your dominant hand atop your non-dominant hand. Then, move both hands in a circular motion, traversing from front to back directions.