Old English byrst

← Old English *byrstel (link)

← Old English berstan (link)

← Middle English bristil (link)

← Middle English bristel (link)

← Middle English berst (link)

← Middle English barst (link)

← Proto-Germanic *burstiz (inherited)

← Proto-Germanic *brestuz (inherited)

← Proto-Indo-European *bʰr̥stís (inherited)

← Proto-Indo-European *bʰres‑ (inherited)

← Scots bristle (link)

← Scots brissle (link)

→ English burr (cognate)

→ Middle English brest (derived)

→ Irish burra (derived)