Words and Proper Names

foscul ṅdíriuch

785.
Sayers (William): Varia: IV. Three charioteering gifts in Táin bó Cúailnge and Mesca Ulad: immorchor ṅdelend, foscul ṅdíriuch, léim dar boilg.
In Ériu 32 (1981), pp. 163–167.
immorchor ṅdelend: ‘use of charioteer’s wand to sight a straight course and to hold the chariot on this course over long distances’; foscul ṅdíriuch (‘straight / level cleaving or sundering’); léim dar boilg (‘leaping across a gorge / gap / chasm’ as compliment to the other two skills).