The Spanish word 'tinta' (meaning 'ink') comes from the Latin word 'tincta', which was the feminine past participle form of the verb 'tingere' meaning 'to dye' or 'to color'. This etymology makes intuitive sense since ink is essentially a liquid dye used for writing and printing. The transformation from Latin 'tincta' to Spanish 'tinta' involved a simple sound change where 'ct' became 't', which is a common phonological development in the evolution from Latin to Spanish.

Some related Spanish words include 'tintura' (tincture), 'teñir' (to dye), and 'tinte' (dye, tint). All these words share the same Latin root 'tingere' and relate to the concept of coloring or dyeing. While 'tinta' specifically evolved to mean the liquid used for writing, its relatives maintained meanings more closely related to the original sense of dyeing or coloring.

English speakers might recognize the connection to words like 'tint', 'tincture', and 'tinge', which all come from the same Latin root 'tingere'. Just as 'tinta' specialized to mean 'ink' in Spanish, these English words maintained meanings related to colors and dyeing. 'Tint' refers to a slight trace of color, 'tincture' originally meant a dyed solution, and 'tinge' means to add a slight amount of color to something.