IPA: /ˈsɛlvɪdʒ/
KK: /ˈsɛlvɪdʒ/
The edge of a piece of fabric that is finished to prevent fraying.
The tailor carefully cut the fabric, making sure to keep the selvedge intact.
Selvedge comes from the Old English 'self' (meaning self or same) and 'edge' (meaning border or margin). The term originally referred to the edge of a piece of fabric that is finished to prevent unraveling, thus being the 'self' edge of the material.
Think of the 'self' edge of fabric that keeps it from unraveling — that's why selvedge refers to the finished edge of cloth.