たいおう
correspondence, equivalence, response
You turn to face the thing and answer it, which is what a good one looks like. He gets back to people the same day, tie たい on, because he owes おう them that: たいおう.
反応 はんのう is a reaction, what happens to you. 対応 is a response you choose and then manage.
This is one of 1,500 words in Emaki, a free spaced repetition trainer with a written mnemonic on every card.
Study 対応 in EmakiFree, no account needed. Your progress stays in your browser.
Emaki is not affiliated with, or endorsed by, Kaishi 1.5k or its authors. The word, reading and meaning come from the Kaishi 1.5k deck, used with their permission. The mnemonic, the note and the kanji breakdown are original work, published under CC BY-SA 4.0.