The Spanish word 'desechado' (meaning 'discarded') comes from the verb 'desechar' ('to discard') combined with the past participle suffix '-ado'. The verb 'desechar' itself can be traced back to the Latin word 'disiectare' meaning 'to throw apart', which was formed by combining two Latin elements: the prefix 'dis-' meaning 'apart, away' and the verb 'iactare' meaning 'to throw'. Over time, as Latin evolved into Spanish, 'disiectare' transformed into 'desechar', maintaining the core meaning of disposing or throwing something away.

A simpler related Spanish word is 'echar' (to throw, to cast), which comes from the same Latin root 'iactare'. While 'echar' retained the basic meaning of throwing or casting, 'desechar' specifically came to mean throwing away or discarding something, influenced by the addition of the 'des-' prefix (from Latin 'dis-') which adds the notion of separation or removal.

The English word 'eject' is etymologically related to 'desechado', as it also comes from Latin 'iactare' (to throw). While 'eject' maintained the meaning of forcefully throwing out or expelling something, it took a different prefix ('e-' meaning 'out') rather than 'dis-'. Similarly, other English words like 'inject', 'project', and 'reject' all share this same Latin root, each with a different prefix that modifies the basic meaning of throwing or casting.