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 अयव
अयवayavaa.Deficient.
Deficient.
Having worthless or no barley, such as a religious ceremony (also अयवक in this sense).
Derived forms and compounds
-वः
Name of a worm bred in excrement
(अयवन्Masculine, अयवस्Neuter also). The dark half of the month; पूर्वपक्षा वै यवा अपरपक्षा वा अयवास्ते हीदं सर्वं युवते चायुवते च Śat. Br.