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 संबन्धक
संबन्धकsaṃbandhakaA friend.
Derived forms and compounds
-कः
A friend.
A relation by birth or marriage; संबन्धकेन राजेन्द्र तौ तु वीर्यबलान्वयात् Mb.5.17.1.