IPA: //sʌbˈɛkoʊ//
KK: /sʌbˈɛkoʊ/
A signal in the card game whist that is given after a player has had no opportunity to make a direct echo in the trump suit, typically following a partner's lead of trumps.
In the game of whist, I used a subecho to indicate my hand after my partner led with trumps.
Subecho → It is formed from "sub-" (meaning under or below) and "echo" (from Greek "ēkhō", meaning sound or to sound). The word "subecho" refers to a sound that is produced beneath or as a result of another sound, often implying a secondary or reflected sound.
Think of a sound that comes from 'under' ('sub-') another sound — that's what a subecho is, a sound that reflects or follows another.
No commonly confused words.