Encara no tenim significats per a "grow stertorous".
1The morning wore on, and the old man's breathing grew stertorous.
2Her breathing grew stertorous, the mouth opened, and the pale gums, drawn back, made the teeth look longer and sharper than ever.
3He felt his sinews straining until it seemed that they must crack; the sweat stood out upon his brow; his breathing grew stertorous.