(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.
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(a) To assume an expression of amusement or pleasure, smile; smilen at (of), smile at (sth.), be pleased or amused by (sth.); (b) to assume a pleasant, kindly expression; wear a smile; smilen among……
