a fortiori
/ˈeɪˌfɔːtɪˈɔːraɪ/adverb & adjective
- used to express a conclusion for which there is stronger evidence than for a previously accepted one更有理由地（的）, 更不容置疑地（的）（用于引出比先前接受的结论更可信的结论）：
as adv. they reject all absolute ideas of justice, and a fortiori the natural-law position.他们拒绝所有绝对的司法观点, 更不用说自然法立场了。
词源
early 17th cent.: Latin， from a fortiori argumento 'from stronger argument'.