The Spanish adverb 'sintéticamente' (meaning 'synthetically') comes from combining the adjective 'sintético' with the adverbial suffix '-mente'. The suffix '-mente' itself comes from the Latin word 'mens, mentis' meaning 'mind', and is used to form adverbs in Spanish similar to how '-ly' is used in English.

Going further back, 'sintético' comes from the Ancient Greek word 'synthetikos' (συνθετικός) meaning 'putting together' or 'constructive'. This Greek word was formed by combining two elements: 'syn-' (συν-) meaning 'together' and 'thetikos' (θετικός) meaning 'placed' or 'arranged'.

The evolution from Greek to Spanish maintained the core meaning of 'putting together' or 'combining', which is still evident in the modern usage of 'sintéticamente' to describe doing something in a synthetic or combined manner.

Some related Spanish words include 'síntesis' (synthesis), which refers to the combination or composition of parts to form a whole, and 'sintetizar' (to synthesize). These words share the same Greek roots and maintain the core concept of 'putting together' or 'combining'.

English speakers can easily relate this word to several familiar English terms like 'synthetic', 'synthesis', and 'synthesize'. All these words come from the same Greek roots 'syn-' (together) and 'thetikos' (placed). The English '-ly' in 'synthetically' serves the same function as Spanish '-mente', both creating adverbs from adjectives.