double bass

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

contrabas

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.
Zij speelt de contrabas in het schoolorkest.
The deep resonance of the double bass filled the concert hall.
De diepe resonantie van de contrabas vulde de concertzaal.