←
Old English tǣċan (cognate)
←
Old English teach (mention)
←
Proto-Indo-European *deyḱ- (root)
←
Proto-Indo-European *déyḱti (inherited)
←
Proto-Indo-European *dḗyḱst (inherited)
←
Proto-Indo-European *deyḱ-s (derived)
←
Proto-Indo-European *deyḱ- (mention)
←
Proto-Italic *deikō (inherited)
←
Navarro-Aragonese deçir (link)
→
Norman dithe (inherited)
→
Old Occitan dir (inherited)
→
Romansch dir (inherited)
→
Romansch gir (inherited)
→
Romansch deir (inherited)
→
Walloon dire (inherited)