The Spanish word 'análisis' comes from Ancient Greek through Latin. It was built from three Greek parts: 'ana-' meaning 'up, back, or again', 'lyein' meaning 'to loosen', and the suffix '-sis' which forms action nouns. These combined to form 'analysis', literally meaning 'a loosening up' or 'breaking down' - which makes sense when you think about how analysis involves breaking something down into smaller parts to understand it better. This word passed through Latin 'analysis' before entering Spanish as 'análisis', keeping essentially the same meaning throughout its journey.

Some related Spanish words include 'analítico' (analytical), 'analizar' (to analyze), and 'analista' (analyst). These words all share the same Greek roots and form a family of words related to the process of examining and breaking things down into their component parts.

The English word 'analysis' is a direct cognate of the Spanish 'análisis', sharing exactly the same Greek origin and meaning. Other related English words include 'analyze', 'analytical', and 'analyst'. The connection is easy to see both in spelling and meaning - both languages preserved the original Greek concept of 'breaking something down' for detailed examination.