DICT.TW Dictionary Taiwan

 mud·sill /-ˌsɪl/
 底梁

 Mud·sill n.
 1. The lowest sill of a structure, usually embedded in the soil; the lowest timber of a house; also, that sill or timber of a bridge which is laid at the bottom of the water. See Sill.
 2. Fig.: A person of the lowest stratum of society; -- a term of opprobrium or contempt. [Southern U. S.]
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