1. In a manner lacking stability, balance, or firmness; with wavering or shaky movement
He walked unsteadily after the accident.
Ele caminhava instabilmente após o acidente.
2. In an unreliable or inconsistent manner; without constancy
The economy grew unsteadily throughout the year.
A economia cresceu instabilmente durante todo o ano.
3. With uncertainty or hesitation; in a trembling or faltering way
She spoke unsteadily, her voice trembling with emotion.
Ela falava instabilmente, sua voz tremendo de emoção.