Where does “వాక్యము” come from?

వాక్యము (Telugu) comes from Sanskrit वाक्य, from Sanskrit वच्, from Proto-Indo-European wekʷ- — to speak, to sound out.

వాక్యము (Telugu): sentence

Definitions

Step	Language	Word	Meaning
1	Sanskrit	वाक्य	speech, saying, assertion, statement, command,...
2	Sanskrit	वच्	to speak, utter, say
3	Proto-Indo-European	wekʷ-	to speak, to sound out

వాక్యము — Etymology, Origin & Word History | Etymology Explorer