expression, ichidan verb
can be discarded; can be cut down
Potential or passive form of 切り捨てる. Used when something can be thrown away, cut off, or omitted, or when it is subject to being discarded.
この書類はもう切り捨てられる。
This document can be discarded now.
不要な枝は切り捨てられる。
Unnecessary branches can be cut down.
切り捨てる is the base verb meaning 'to cut off and discard' or 'to omit'; 切り捨てられる is its potential/passive form.
Passive/potential form of 切り捨てる (cut off and discard), from 切る (cut) + 捨てる (throw away).