The Spanish adverb 'sincrónicamente' (meaning 'synchronically') comes from combining the adjective 'sincrónico' with the adverbial suffix '-mente'. The suffix '-mente' itself comes from the Latin word 'mens, mentis' meaning 'mind', which evolved to form adverbs in Spanish similar to how '-ly' works in English.

The adjective 'sincrónico' traces back to Ancient Greek through Late Latin. It was formed from two Greek elements: 'syn-' meaning 'together' and 'chronos' meaning 'time'. These combined to form 'synchronos' ('contemporary') in Greek, which passed into Late Latin as 'synchronus' before entering Spanish with the addition of the adjective suffix '-ico'.

Some related Spanish words that might be more familiar include 'sincronizar' (to synchronize), 'sincronización' (synchronization), and the simpler adjective 'síncrono' (synchronous). All these words share the same Greek roots referring to things happening at the same time.

English speakers can easily connect this word to familiar terms like 'synchronize', 'synchronous', and 'synchronicity'. These English words come from the same Greek roots 'syn-' (together) and 'chronos' (time). You might also recognize 'chrono-' in other time-related English words like 'chronology', 'chronic', and 'chronicle'.