यर्हिyarhiind.When, while, whenever.
[यद्-र्हिल्, Compare Parasmaipada V.3.21]
कोशःDictionaries
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.