The Spanish word 'sancocho', meaning 'stew', comes from the Latin word 'subcoctum', meaning 'undercooked'. This Latin word was formed by combining two elements: the prefix 'sub-' meaning 'under, below' and 'coctus' meaning 'cooked'. Over time, as the word evolved from Latin to Spanish, 'subcoctum' transformed into 'sancocho', while maintaining its connection to cooking, though now referring specifically to a type of stew rather than something undercooked.

A related Spanish word is 'cocer' (to cook), which comes from the same Latin root 'coctus'. You can see how both 'sancocho' and 'cocer' share this connection to cooking, with 'sancocho' being a specific dish and 'cocer' being the general act of cooking.

Several English words share the same Latin ancestry, particularly through 'coctus'. These include 'cook', 'concoct', and 'decoction'. The word 'concoct' is especially interesting as it follows a similar pattern to 'sancocho', being formed with a prefix (con-) plus the cooking root, and refers to preparing or devising something, often a mixture or plan. The prefix 'sub-' seen in the original Latin word is also familiar to English speakers in words like 'submarine' (under the sea) and 'subway' (under the way).