The Spanish word 'carnosidad' (meaning 'fleshiness' or 'fleshy growth') comes from the Latin word 'carnositas', meaning 'fleshiness'. This Latin term was derived from 'carnosus' (meaning 'fleshy'), which itself came from the Latin root 'caro/carnis' meaning 'flesh'. In Spanish, this developed into the adjective 'carnoso' ('fleshy'), and when combined with the suffix '-idad' (which forms abstract nouns), it created 'carnosidad'.

The development of this word shows how Spanish inherited the Latin pattern of creating abstract nouns to describe qualities or conditions related to flesh or meat.

Several common Spanish words share this same Latin root. The most basic related word is 'carne' meaning 'meat' or 'flesh', which is much more commonly used in everyday Spanish. The adjective 'carnoso' meaning 'fleshy' or 'meaty' is also related. These words maintain a clear connection to the original Latin meaning of flesh or meat.

English speakers might recognize this root in words like 'carnivore' (meat-eater), 'carnation' (originally named for its flesh-colored petals), and 'carnal' (relating to physical, especially sexual, needs). The word 'carnival' also comes from this root - it literally meant 'removal of meat' and referred to the festivities before the fasting period of Lent. All these words share the Latin root 'caro/carnis' meaning 'flesh'.