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.
Entry मृध्
मृध्mṛdh1 U. (मर्धति-ते)
1 Ubbayapada (Parasmaipada and Atmanepada) (मर्धति-ते)