Proto-Indo-European *er-

→ English art (derived)

→ English earnest (derived)

→ French roseau (mention)

→ Old French rosel (derived)

→ Latvian straujš (mention)

→ Latvian ērce (mention)

→ Latvian ērts (mention)

→ Latvian rakstīt (mention)

→ Norman êpèrvi (mention)

→ Occitan raus (derived)

→ Albanian orë (inherited)