Etymology 1

According to Wikipedia “The word [analyI sis] comes from the Ancient Greek ἀνάλυσις (analysis, “a breaking-up” or “an untying;” from ana- “up, throughout” and lysis “a loosening”).”

Separately, Wikipedia states  the word “bullshit” means nonsense and derives from the “word ‘bull’ [which] may have derived from the Old French bole meaning ‘fraud, deceit'”

However, perhaps “analysis’ is rooted in the word “anal.” At the dawn of humanity, humans were hunter-gatherers. In hunting for prey, hunters would follow the tracks of an animal and identify it and its proximity by analyzing its feces for freshness, form, texture, taste and smell. Thus, the first analysis was the examination of anal excrement.

As civilization developed with the advent of farming, hunters tracking bison at times initially misidentified the feces of a rancher’s bull as that of bison; bullshit, not the real thing they were seeking.