1. 口才好：persuasively 口才好地 | persuasiveness 口才好 | persulfatepersulphate 过硫酸盐

2. 善劝：(29)敬重 honor | (32)善勸 persuasiveness | (35)主動 initiative

3. 令人信服：Patience 耐心 | Persuasiveness 令人信服 | Punctuality 守时

4. 说服力; 信服 (名)：persuasively 口才好地; 令人信服地 (副) | persuasiveness 说服力; 信服 (名) | pert 无礼的, 鲁莽的, 爱管闲事的 (形)

noun

1. the power to induce the taking of a course of action or the embracing of a point of view by means of argument or entreaty

e.g. the strength of his argument settled the matter

Synonym: strength