suasive (adj.)

• authoritative
• charismatic
• charming
• consequential
• effective
• effectual
• efficacious
• enchanting
• estimable
• exhortative
• exhortatory
• hortative
• hortatory
• important
• influential
• magnetic
• momentous
• personable
• persuasive
• potent
• powerful
• prestigious
• reputable
• strong
• substantial
• telling
• weighty
• winning