रिपुripuAn enemy, a foe, an opponent.
[रप् उन् पृषोdenotes that the rest of the word under consideration is to be supplied Uṇ.1.26]
Derived forms and compounds
आत्मैव ह्यात्मनो बन्धुरात्मैव रिपुरात्मनः ॥
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.