convinced
adjective
[ kənˈvɪnst ]
• completely certain about something.
• "she was not entirely convinced of the soundness of his motives"
convince
verb
• cause (someone) to believe firmly in the truth of something.
• "Robert's expression had obviously convinced her of his innocence"
Origin:
mid 16th century (in the sense ‘overcome, defeat in argument’): from Latin convincere, from con- ‘with’ + vincere ‘conquer’. Compare with convict.