sonar

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return

By anacronymic evolution from SONAR.

Diciendo y haciendo, el pícaro sacó del bolsillo cuatro piezas de plata y las hizo sonar. — A First Spanish Reader, Erwin W. (Erwin William) Roessler
No hace más que sonar el timbre... Amigos que vendrán a convencerte; gente que vendrá a saber... MANUEL. — Tres Comedias : $b Sin querer; De pequenas causas...; Los intereses creados, Jacinto Benavente
We’ve seen progress in sonar, torpedoes, and other belligerent machinery, but sailors and scientists—to say nothing of tourists—have yet to voyage in a submarine with the luxury and efficiency of the Nautilus. — Twenty Thousand Leagues Under the Seas: An Underwater Tour of the World, Jules Verne

echo sounder, asdic

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