austere : (adj.) kaṭhina; pharusa; ugga; tibba.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

sdom pa

[translation-san] {LCh,C,L} saṃvara

[translation-san] {MSA} saṃvṛtti

[translation-san] {C} saṃyama

[translation-san] {C} saṃcara

[translation-san] {C} saṃlekha

[translation-san] {MSA} yang dag par sdom pa = saṃyama

[translation-eng] {Hopkins} vow; bind; tie; fasten; obligation; bring together; collect; discipline

[translation-eng] {C} restraint(s); restrain; self-mastery; engagement; (austere) penance

[comments] compare: dam tshig, pledge

Jeffrey Hopkins' Tibetan-Sanskrit-English Dictionary