0 with eyes that are red or have tears in them so you cannot see clearly, because you are tired or have just woken up:
He put his scowling face up close to mine and breathed blearily and belligerently at me.
The drunken man roused himself with a start and stared blearily, unintelligently into the other's face.
He stared at his unshaven face blearily.
He shook his head blearily.