OE can(n) (1st and 3rd pers.sing. pres.) ← cunnan ＜ Gmc kunnan (G knnen to be able ＆ 🔗⭐🔉

OE can(n) (1st and 3rd pers.sing. pres.) ← cunnan ＜ Gmc kunnan (G knnen to be able ＆ kennen to know / Du. kunnen) ← IE gn- to know (L gnscere to know / Gk gi-gnskein): cf. could, ken^１, know

研究社新英和大辞典 ページ 177050 での【n1st and 3rd pers.sing. pres.】単語。