tenaciously
Definitions
In a manner characterized by keeping a firm hold; persistently.
With great determination or persistence in adhering to a course of action or belief.
Examples
The detective clung tenaciously to the belief that the suspect was innocent despite the mounting evidence.
The ivy climbed tenaciously up the side of the old stone wall, reaching toward the sunlight.
Synonyms
persistently doggedly resolutely steadfastly determinedly stubbornly relentlessly
Antonyms
weakly hesitantly indifferently vacillatingly halfheartedly irresolutely faintly