Irish téacht

← Proto-Celtic *tenkto (inherited)

← German dicht (cognate)

← Proto-Indo-European *tenk- (root)

← Proto-Indo-European *tenk- (derived)

← Middle Irish téchtaige (inherited)

← Dutch dicht (cognate)

← Old Irish coiteichtea (inherited)

← Swedish tät (cognate)

→ Irish téachtapaite (affix)

→ Irish antaithéachtach (affix)