Sentence:  Tarzan on his part never lost an opportunity to show that he fully reciprocated his foster father's sentiments, and whenever he could safely annoy him or make faces at him or <WSD>hurl</WSD> insults upon him from the safety of his mother's arms, or the slender branches of the higher trees, he did so. 
Meaning of the word marked with <WSD> tags:  To utter (harsh or derogatory speech), especially at its target.