Letters that make cast-off
s, a, o, f, c, t are letters that make 'cast-off'
1 possible definitions for 'cast-off'
Under this definition, cast-off is an adjective and has the following properties:
discarded, throwaway(a), thrown-away(a) have the same meaning as 'cast-off(a)'
unwanted is similar to cast-off(a).
"wearing someone's cast-off clothes", "throwaway children living on the streets", "salvaged some thrown-away furniture"