faltering
n. B2 Upper Intermediate US //ˈfɔɫtɝɪŋ// UK //fˈɒltəɹɪŋ// fal·ter·ing
n. staggering or losing your balance while walking. It can also describe a voice that is shaking or a plan that is starting to fail.
n. staggering or losing one's balance while walking; failing to maintain a steady course or a steady voice. Often used to describe a physical stumble or a weakening of resolve.
The old man took a faltering step toward the door.
After the long hike, her legs felt weak and she took a faltering step onto the uneven rocks.
The speaker's faltering voice betrayed his nervousness, though he managed to finish the speech with a final, steady breath.
From falter + -ing.