Is the sign for 'sis' the same as 'sister'?
Yes, in ASL, the sign for 'sis' is typically the exact same sign used for 'sister'. In very casual conversation, some people might quickly fingerspell S-I-S, but the standard sign is the most common and universally understood.
Why does the sign start at the chin?
In ASL, signs related to females (like mother, aunt, girl, and sister) are placed at the lower half of the face, specifically around the chin or jawline. Male signs are placed at the top half of the face.
Do I have to use both hands for this sign?
Yes, this is a two-handed sign. Your dominant hand does the moving, starting at the chin, while your non-dominant hand acts as a stationary base in front of your chest to receive the movement.