Sentence:  Some of the most beautiful and thus appealing physical theories, including quantum electrodynamics and quantum gravity, have been dogged for decades by infinities that erupt when theorists try to prod their calculations into new domains. Getting rid of these nagging infinities has probably occupied far more effort than was spent in <WSD>originating</WSD> the theories. 
Meaning of the word marked with <WSD> tags:  To cause to be, to bring into existence; to produce, initiate. (from 17th c.)