The Spanish word 'tirria' (meaning 'aversion' or 'antipathy') has an interesting journey from ancient Greek through Medieval Latin. It originated from the Greek word 'pyrros' (πύρρος), which meant 'red' or 'reddish'. This Greek term evolved into Medieval Latin 'birria', which referred to a carnival character. By around 1475, it had become 'dirria' in Spanish, meaning 'aversion', before finally evolving into the modern Spanish 'tirria'.

The semantic evolution from 'red' to 'aversion' likely developed through the association of carnival characters (who often wore red or had reddish faces) being objects of mockery or distaste, eventually leading to the general meaning of antipathy or strong dislike.

While 'tirria' is a relatively unique word in modern Spanish, its historical form 'dirria' shows how Spanish consonants can shift over time (d→t). However, there aren't many common Spanish words that share this specific etymological root.

While English doesn't have any direct cognates of 'tirria', the Greek root 'pyrros' meaning 'red' does appear in some English words. For example, the scientific term 'pyrrhic' (relating to fire or red) and 'pyrite' (fool's gold, which has a reddish-golden color) come from the same Greek root. The name 'Pyrrhus' (a famous Greek general) also shares this etymology, meaning 'flame-colored' or 'red-haired'.