I’m not completely sure what you mean by “Upsargs on thrithankars.” Here are two possible Jain contexts that might fit, with brief clarifications:

• Upsarga (upasarga) in Jain chant/verse practice: In Jainism, upasargas are prefixes or introductory syllables used before names in prayers or stotra verses. They set respectful or auspicious framing for the Tirthankaras or other revered figures. If you have a specific stotra or verse in mind, share a line or the exact name and I can explain the upasarga used there and its meaning in that context.

• Tri-thankars / Tri-ratnas context: If by “thrithankars” you mean a trio connected with Jain worship, a common Jain framework involves the Ratna-traya (three jewels): Right Faith (Samyak-Darshan), Right Knowledge (Samyak-Jnana), and Right Conduct (Samyak-Charitra). These are the core spiritual aims in Jain practice, not three individual Tirthankaras. If you meant three specific Tirthankaras or a trio of figures, please specify which ones and I’ll explain their devotional phrases and the upasargas used with them.

If you can share:

• the exact term you saw (correct spelling helps), or
• the specific text or verse you’re referring to,

I can give a precise, authentic Jain explanation in line with Digambar/Shwetambar interpretations.