Answer: semi

AnswerCrossword Clue
SEMIHalf, to start with
SEMITrailer
SEMIKind of final
SEMIHighway behemoth
SEMIMember of a convoy
SEMIHighway giant
SEMIPenultimate game
SEMIRig on the road
SEMITruck-stop sight
SEMIConvoy member
SEMIPre-final match
SEMIBig truck
SEMISecond-to-last match
SEMICab attachment
SEMIVehicle capable of jackknifing
SEMIHighway heavyweight
SEMILong hauler
SEMIWeigh-station stopper
SEMIHalf up front?
SEMIBig roller
semisemifinal contest or round
SEMIAutomatic start
SEMIHighway hauler
SEMIInterstate sight
SEMIRig
SEMITractor-trailer
SEMI18-wheeler
SEMIBig rig
SEMICircular opening?
SEMIFinal intro?
SEMI16-wheeler
SEMIFinal preceder
SEMIPrecedes precious and sweet
SEMITruck stop stopper
SEMIEighteen-wheeler, for short
SEMIInterstate hauler
SEMILarge Marge drives one in "Pee-wee's Big Adventure"
SEMICBer's truck
SEMIConvoy component
SEMIType of truck