The affix śyan is optionally used after the root akṣ 'to bore or hew' when it is preceded by the preposition sam and when a sārvadhātuka affix denoting an agent, follows. ,
Thus तक्षति or तक्ष्णोति काष्टं 'he hews the wood'. But सन्तक्षति वाग्भिः 'he cuts with speech'.,