He is unable to walk 'unassisted'. [='unaided']
an 'unassisted' double play
The goal was 'unassisted'.
(..) MAGGIE: Vein. AID: Kid started walking. AID: Three unassisted steps. MAGGIE: Get it on video? AID: I wasn't even there. MAGGIE: You failed as a father already. How does that feel? MAGGIE: (..)1998 City of Angels