返詞 is read as へんし (henshi) and means reply.
へんし
henshi
かえりざき
comeback (e.g. in business)
へんそうしょうごう
echo check
へんじをのばす
to delay one's answer
かえしわざ
counterattack
かえしばり
back stitch
かえりち
spurt of blood (from one's victim)
ことば
language
めいし
noun
のりと
congratulatory address
だいめいし
pronoun
けいようし
adjective
どうし
verb