Be-murcnian

According to the Old English Dictionary:

be-murcnian

p. ode; pp. od [be, murcnian to murmur] To murmur, murmur greatly; obmurmurare :-- Hú ungemetlíce, ge Rómware, bemurcniaþ how immoderately, O Romans, do ye murmur, Ors. 1, 10; Bos. 34, 9. be-murcnian