Прасинотибетский: *r[ā]kʷ
Значение: noise, roar
Тибетский: ãkhrog-pa to roar, rush, buzz; grag-pa noise, rumour; ãgrag(s)-pa to cry, sound, resound; sgrog-pa to call, call out.
Бирманский: rǝuk to sound, buzz.
Качинский: (H) gǝro to din, clamour.
Лушей: rāk to make a noise.
Лепча: grik noise, sound of anything
