相槌 あいづち
aizuchi

Noun

1. aizuchi; backchanneling; interjections indicating that one is paying attention — explanation

かくかくしかじかで、と事情 じじょう説明 せつめいしたのだが、あんまり興味 きょうみなさそうな相槌 あいずちしか かえってこなかった。
kakukaku shikajikade to jijōo setsumē shita nodaga ammari kyōmi nasasōna aizuchishika kaette konakatta.
I explained the situation, as this, that and such and such, but they just nodded along without showing much interest.
Noun

2. two smiths hammering at an object in turn

Related to 向こう鎚
Other forms: