Valmiki Ramayana Yuddha Kanda Sarga 77 Shloka 22

बाहुभ्याम् both arms, शिरोधराम् holding his neck, परिगृह्य taking, परिवृत्य twisting round, भैरवम् terribly, नदतः crying, महत् great, शिरःhead, उत्पाटयामानbroke off,

Taking hold of the neck with both arms and twisting it round Hanuman broke off the neck of Nikumbha while he was crying terribly.