1. in a determined and unwavering manner; with firm resolve

Examples

• She steadfastly refused to give up on her dream of becoming a doctor.
• The team worked steadfastly toward their goal despite numerous setbacks.
• He steadfastly maintained his innocence throughout the trial.
• The protesters steadfastly demanded justice for the victims.
• She steadfastly supported her friend through the difficult times.
• The company steadfastly adhered to its ethical principles.