All languages have vowels and consonants and these combine together to form syllables.
His tongue moves with a will of its own, forming hard broken syllables, but he controls himself enough to avoid making a sound.
His chapped lips formed unintelligible syllables, the tube getting in the way.
At 6 months, child is able to form syllables.
His mouth seemed to be forming stray syllables, but the wind whipped them away, whether there was any sense in them or not.
The high-school boy stammered, and painfully formed syllables with his lips.
He turned and began to form syllables.
It formed syllables like the chimes of a low-pitched celeste.
The wizard's mouth twisted to form ancient syllables; his face was pale.
It was difficult to believe that such a long, hard beak could form human syllables.