acústico
acoustic
acoustic
relating to sound
+
-o
masculine adjective ending
Acústico means acoustic and is directly related to the English word acoustic0, with the -o1 ending making it a masculine adjective1 in Spanish.
adjective
- acousticRelating to sound or the sense of hearingLa guitarra acústica tiene un sonido más suave. // The acoustic guitar has a softer sound.