Sentence:  Suddenly a treble auto <WSD>horn</WSD> tootley-toot-tootled , and , thumbing hopefully , I saw emergent in windshield flash : red lips , streaming silk of blonde hair and - ah , trembling confusion of hope , apprehension , despair - the leering face of old Herry . 
Meaning of the word marked with <WSD> tags:  a noise made by the driver of an automobile to give warning;