trout

Etymology

From Old English 'truht,' from Late Latin 'tructa,' from Latin 'tructa' (a kind of sea fish, trout), from Greek 'trōktēs' (a sharp-toothed fish, literally a gnawer or biter), from 'trōgein' (to gnaw, to eat, to consume), from Proto-Indo-European *terh₁- (to rub, to turn, to bore through, to wear away). The fish was named for its teeth — it was 'the biter.' The PIE root *terh₁- is also the source of 'throw' (originally meaning to twist or turn), 'thread' (something twisted), 'through' (boring through), and Latin 'terere' (to rub, to wear down), which gave 'trite' (literally worn out), 'attrition' (a wearing away), 'detriment' (a rubbing off), and 'contrite' (ground down with remorse). The word was borrowed into Old English very early from Latin, suggesting the Romans introduced the term — and possibly cultivated trout fishing — in Britain. Key roots: *terh₁- (Proto-Indo-European: "to rub, to turn, to bore through").

Trout traces back to Proto-Indo-European *terh₁-, meaning "to rub, to turn, to bore through". Across languages it shares form or sense with French truite, Spanish trucha, Italian trota and German (different root — from spotted) Forelle, evidence of a shared etymological family.