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 शपथ
शपथśapathaCursing.
[शप्-अथन् Uṇ.3.112]
Cursing.
A curse, an imprecation, anathema.
An oath, swearing, taking or administering an oath, asseveration by oath or ordeal; आमोदो न हि कस्तूर्याः शपथेनानुभाव्यते Bv.1.12; Ms.8.19.
Conjuration, binding by oaths; सपदि शपथैः प्रत्यावृत्तिं प्रणम्य च याचते Māl.3.2.