un·der·car·riage 
/ˈʌndɚˌkerɪʤ/ noun
plural un·der·car·riag·es /ˈʌndɚˌkerɪʤ/ noun [count] 1 chiefly US : the supporting structures of a car, truck, etc. 2 : landing gear
▪ There was a problem with the plane's undercarriage.
▪ There was a problem with the plane's undercarriage.
