तेन तं ह बृहस्पतिरुद्गीथमुपासांचक्र एतमु एव बृहस्पतिं मन्यन्ते वाग्घि बृहती तस्या एष पतिः ॥ १.२.११ ॥
In plain words
Bṛhaspati worshipped it as the Udgītha; and men hold this very breath to be Bṛhaspati, since speech is great and it is the lord of speech.
The commentators
Chāndogyopaniṣadbhāṣyam· bhāṣya
तथा वाचो बृहत्या पति तेनासौ बृहस्पति ॥
In plain words
And thus, because he is the lord of speech which is vast, he is Brihaspati.
Close to the Sanskrit
And thus he is the lord of speech which is Brihati, therefore he is Brihaspati.