cogent
1. [ adjective ] having the power to influence or convince
Synonyms: powerful potent
Examples:

"a cogent analysis of the problem" "potent arguments"

Related terms: influential
2. [ adjective ] powerfully persuasive
Synonyms: weighty telling
Examples:

"a cogent argument" "a telling presentation" "a weighty argument"

Related terms: forceful
Similar spelling:   Cosentino