Eṣṭaneya·An interrogative word which is used to ask “Which ordinal number in a series?”, where the answer would be an ordinal number like “First” / “Second” / Third / “Hundredth” / Thousandth. Literally it would be Which-th.
Sankocha·The feeling of embarrassment due to receiving an inordinately and perhaps inappropriately large or extravagant gift or favor, that makes you feel obliged to return the favor when you can’t.