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 भूष्णु
भूष्णुbhūṣṇua.Being, becoming; as in अलंभूष्णु q. v.
[भू-ग्ष्णु]
Being, becoming; as in अलंभूष्णुquod vide, which see
Wishing for wealth or prosperity; क्षत्रियं चैव सर्पं च ब्राह्मणं च बहुश्रुतम् । नावमन्येत वै भूष्णुः कृशानपि कदाचन ॥ Ms.4.135.