Apte Sanskrit-English Dictionary
a. 1 Not proper to be ad- dressed; avācyo dīkṣito nāmnā yavī- yānapi yo bhavet Ms. 2. 128.
2 Impro- per to be uttered; vile, bad; avācyaṃ vadato jihvā kathaṃ na patitā tava Rām.; ºvādāṃśca bahūn vadiṣyaṃti tavāhitāḥ Bg. 2. 36.
3 Not distinctly expressed, not expressible in words; ºtā, ºtvaṃ impro- priety; reproach, calumny. Comp. deśaḥ ‘the unspeakable place,’ the vulva (yoni).