Not firm or stable; prone to change or fluctuation.

Lacking in confidence or assurance; wavering.

आत्मविश्वासहीन

English Usage: She felt unsteady during her presentation, forgetting some key points.

Hindi Usage: उसने अपनी प्रस्तुति के दौरान अस्थिर महसूस किया, कुछ मुख्य बिंदुओं को भूल गई.