Usar "unuttered" en una oración

1. There are others which to now have remained unuttered

2. We had, in the course of time, developed a minor vocabulary of looks, smiles, grimaces and gestures that allowed us to communicate and share a few private, unuttered thoughts, understandings and amusement

3. One idea only still throbbed life-like within me—a remembrance of God: it begot an unuttered prayer: these words went wandering up and down in my rayless mind, as something that should be whispered, but no energy was found to express them—