V. S. Apte, The Practical Sanskrit–English Dictionary. Look up any word of the Gita in Devanagari, IAST or Harvard-Kyoto, or browse the headwords letter by letter.
Marvellous, wonderful, extraordinary, astonishing, strange, curious आश्चर्यो गवां दोहोऽगोपेन Sk.; तदनु ववृषुः पुष्पमाश्चर्यमेघाः R.16.87; denotes that the rest of the word under consideration is to be suppliedदर्शनो मनुष्यलोकः Ś.7. र्यम् A wonder, miracle, marvel; किमाश्चर्यं क्षारदेशे प्राणदा यमदूतिका Udb. कर्माश्चर्याणिUbbayapada (Parasmaipada and Atmanepada)1. wonderful deeds; K.65; Mv.1; Bg.11.6;2.29.
Surprise, wonder, astonishment; denotes that the rest of the word under consideration is to be suppliedमय Bg.11.11.
A strange appearance, prodigy.
(Used as an exclamation) A wonder, how strange or curious; आश्चर्यं परिपीडितोऽभिरमते यच्चातक- स्तृष्णया Chāt.2.4; usually with यच्च, यत्र or यदि with a following potential or future.
Derived forms and compounds
-भूतAdjective wonderful, being an object of wonder; K.8.
bahūnyadṛṣṭapūrvāṇi paśyāścaryāṇi bhārata. — Behold the Adityas, the Vasus, the Rudras, the two Ashwins and also the Maruts; behold many wonders that none has beheld, O Bharata. 11·6
आश्चर्याणिāścaryāṇiaccusative plural of the neuter noun āścarya (wonder).