शब्दाः अनुशिष्यन्ते अपशब्देभ्यः विविच्य बोध्यन्ते अनेन इति शब्दानुशासनम् ।
śabdāḥ anuśiṣyante apaśabdebhyaḥ vivicya bodhyante anena iti śabdānuśāsanam |
(Unknown Source)
“That by which śabdas [i.e., words] are taught, that is, by which they are distinguished from improper śabdas and understood, is [called] śabdānuśāsanam [lit. ‘teaching regarding śabdas’].”
Commentary
The term śabdānuśāsanam is used by Pāṇini and is a synonym of vyākaraṇam.