Supratistha Mantra

This mantra is often encountered in the concluding section of Tibetan sadhanas.

Mantra

Siddhaṃ

Tibetan Uchen

Devanāgarī

Transliteration

oṃ su pra ti ṣṭha va jra ye svā hā

oṃ supratiṣṭha-vajraye svāhā

Comments

The Tibetan pronunciation is: oṃ su tra tiktha benza yi so ha

The Sanskrit words are:

supratiṣṭha = standing firm, firmly supported, well supported (from su + pra + √sthā)

√sthā > basic verb form tiṣṭhati ‘to stand, to remain’; and tiṣṭha is then a verbal noun: ‘standing, remaining’.
su- = a suffix meaning ‘well, good, excellent, right, virtuous, very, etc’
pra- = an intensifying suffix: pratiṣṭha = ‘supported, firm, resistant’.

vajra = diamond/thunderbolt; Reality.

-ye = suffix for the dative case meaning to or for

I think the two words go together in a compound (of the karmadhāraya kind) i.e. supratiṣṭhavajraye (with the stress on va). This means something like “for the firmly supported diamond”.