forcefulness

noun
1
the ability to express your opinions strongly and clearly so that other people believe them
قدرت بیان, توانایی نفوذ کلام, توان بیان ایده‌ها به طوری که دیگران قبول کنند
synonym assertiveness
2
the quality in opinions, etc. of being strong and clear so that other people believe them
قاطعیت, شدت در بیان
the forcefulness of his views