[*** \mathrm{converse}^1]

con-(with) + verse(turn)

verb | kənˈvərs | no object

engage in conversation: 会話に参加する

｟かたく｠ 【人と】(形式ばらないで)話をする, 会話をする «with»

e.g. he fell in beside her and they began to converse amicably.: 彼は彼女のそばに倒れ込んで彼は友好的に会話を始めた。

noun | ˈkänˌvərs | archaic

conversation: 会話

converser | kənˈvərsər | noun

late Middle English (in the sense ‘live among, be familiar with’): from Old French converser, from Latin conversari ‘keep company (with’), from con- ‘with’ + versare, frequentative of vertere ‘to turn’. The current sense of the verb dates from the early 17th century.

[*** \mathrm{converse}^2]

con-(with) + verse(turn)

共に違っている方を見ている→逆

source: Math & Science Equation Converse | Intellexual Design, LLC Custom Footwear Apparel & Accessories

a situation, object, or statement that is the reverse of another or corresponds to it but with certain terms transposed: 別のものと反対もしくは対応するがいくらか置き換える状況、物体、陳述

｟かたく｠ ; 〖the ～〗 (事実･語･意見などの)正反対/逆(のもの); 逆の言い方.

e.g. if spirituality is properly political, the converse is also true: politics is properly spiritual.: もしスピリチュアリティが厳密には政治的だというなら、その逆もまた真だ。政治は厳密にスピリチュアルだ。

Mathematics a theorem whose hypothesis and conclusion are the conclusion and hypothesis of another.: 前提と結論が他方で結論と前提となる定理

逆。p \Rightarrow qの逆はq \Rightarrow p

ちなみに裏(inverse) : p \Rightarrow qの裏は\lnot p \Rightarrow \lnot q

adjective | ˈkänˌvərs, kənˈvərs |

having characteristics which are the reverse of something else already mentioned: すでに言及された別のものと反対の特徴を持つ

e.g. the slow process of growth and the converse process of decay.:ゆるやかな成長のプロセスとその逆の腐敗のプロセス

late Middle English: from Latin conversus ‘turned about’, past participle of convertere (see convert).