ef-

1. variant of ex- ¹ (by assimilation) before f: efficient.

Example Sentences

With the EF-5, it’s on grass; we obviously all know what grass looks like so we had a little more license to go, “OK. What is the coolest, scariest-looking tornado that we can find?”

From Los Angeles Times

Tornadoes are rated on the five-point Enhanced Fujita scale not by wind speed but by damage, and EF-5 tornadoes are exceedingly rare, making up only roughly 1% of all tornadoes.

From Los Angeles Times

Among theater students and professors, Professor Fuchs is perhaps best known for “EF’s Visit to a Small Planet,” a short essay she wrote soon after arriving at Yale in 1987 that soon became required reading in theater programs nationwide.

From New York Times

The twister that tore through the city on Tuesday was rated at least an EF-3 by the National Weather Service and was so destructive that it took authorities more than a day to account for the area’s residents.

From Seattle Times

The National Weather Service said initial surveys indicated at least an EF-3 tornado in Greenfield, but additional damage assessment could lead to a more powerful ranking.

From Seattle Times