adverb transversely, obliquely, horizontally (as opp to uddhaṃ vertically, above, & adho beneath), slanting across. In combⁿ uddhaṃ adho tiriyaṃ sabbadhi “in all directions whatever” DN.i.251 = AN.ii.129; similarly uddhaṃ adho t. vâpi majjhe Snp.1055; with uddhaṃ adho DN.i.23, DN.i.153; Vism.176 (where explained)
■ AN.ii.48; Snp.150, Snp.537; Ja.i.96; Iti.120; Dhp-a.i.40 (dvāra-majjhe t across the doorway), Dhp-a.i.47 (sideways); DN-a.i.312; Kp-a.248.

• -taraṇa ferrying across, adj. ˚ā nāvā, a vessel crossing over, a traject Vin.iv.65.

Vedic tiryañc (tiryak) to tiras, see tiro & cp. perhaps Ger. quer = E. thwart, all to; *ter in tarati