sanda
A man who is congenitally impotent.
Vasubandhu at (II.1c) (and elsewhere in the Abhidharmakosa, see Note 13) draws a distinction between the sanda and the pandaka, which Yasomitra understands in the following way: pandakas are those individuals who have lost their indriya, that is, the masculinity or femininity principle, through some means (upakrama), whereas sanda is taken to apply to category 1, the congenitally impotent.
Where it comes from
Ultimately from Sanskrit षण्ढ (ṣaṇḍha, “eunuch, hermaphrodite”), which is often conflated with साण्ड (sāṇḍa, “bull”) in New Indo-Aryan languages due to sound change.
Adapted from the Wiktionary entry sanda (CC BY-SA 4.0).