Sentence:  The car was just about to us , its driver 's fat , solemn <WSD>face</WSD> intent on the road ahead , on business , on a family in Sante Fe - on anything but an old pick-up truck in which two human beings desperately needed rescue . 
Meaning of the word marked with <WSD> tags:  the front of the human head from the forehead to the chin and ear to ear