(a) To make a rumbling sound; (b) to make a low noise; murmur, mumble, mutter; (c) of a crowd: to make noise or tumult; (d) to move with a rumbling sound; (e) to cause a rumbling sound by movement. …

Of a hawk: to wipe (the beak) clean of food, etc. …

(a) Of a person, an animal: to stumble; trip; walk unsteadily; stagger so as to keep from falling; also in fig. contexts; (b) stomblen at, to trip over (sth.); bump into (sth.); stomblen at rishe and……