double bass

US /ˌdʌb.əl ˈbeɪs/
UK /ˌdʌb.əl ˈbeɪs/
"double bass" picture
1.

contrebasse

the largest and lowest-pitched bowed string instrument in the modern symphony orchestra, with four or five strings and a range of about three and a half octaves

:
She plays the double bass in the school orchestra.
Elle joue de la contrebasse dans l'orchestre de l'école.
The deep resonance of the double bass filled the concert hall.
La résonance profonde de la contrebasse a rempli la salle de concert.