undereffective
adjEtymology From under- + effective.
1
Not effective enough.
- The bullpen, overworked and undereffective in the first month, contributed three scoreless innings as five relief pitchers worked as if they were sprinters handing off a baton in a relay race.2007 May 10, Joe Lapointe, “Yanks Work Through Problems to Get Back to .500”, in New York Times: