The Spanish word 'escondido' meaning 'hidden' comes from the Spanish verb 'esconder' (to hide) plus the past participle suffix '-ido'. The verb 'esconder' traces back to the Latin word 'abscondere' meaning 'to hide away', which was formed by combining the prefix 'abs-' (meaning 'away from inside') with the Latin verb 'condere' (meaning 'to hide' or 'to found').

This etymology shows how the Latin elements merged and evolved into Spanish, with 'abs-' + 'condere' becoming 'abscondere', which then developed into Spanish 'esconder'. The past participle 'escondido' follows the regular Spanish pattern of adding '-ido' to form past participles of -er verbs.

Some related Spanish words that might be familiar to Spanish learners include the basic verb 'esconder' (to hide), which is more commonly encountered than the participle form. You might also see 'escondite' (hiding place) or the reflexive form 'esconderse' (to hide oneself). These all share the same root meaning of hiding or concealment.

While English doesn't have any direct cognates from the Latin 'abscondere', we do have some words that relate to the concept of hiding or concealing that came from similar Latin roots. For example, 'abscond' (to depart secretly and hide oneself) comes from the same Latin 'abscondere'. The prefix 'abs-' is also found in English words like 'absent' and 'absolute', though these have taken different semantic paths.