shutyoudaoicibaDictYouDict[shut 词源字典]
shut: [OE] Shut comes ultimately from the same prehistoric Germanic base (*skaut-, *skeut-, *skut- ‘project’) that produced English shoot, and its underlying etymological reference is to the ‘shooting’ of a bolt across a door to fasten it. Its immediate West Germanic ancestor was *skuttjan, which also produced Dutch schutten ‘obstruct’. In Old English this became scyttan, which if it had evolved unchecked would have given modern English shit. For reasons of delicacy, perhaps, the West Midlands form shut was drafted into the general language in the 16th century.
=> sheet, shoot, shot, shout, shuttle[shut etymology, shut origin, 英语词源]
shut (v.)youdaoicibaDictYouDict
Old English scyttan "to put (a bolt) in place so as to fasten a door or gate, bolt, shut to; discharge, pay off," from West Germanic *skutjan (cognates: Old Frisian schetta, Middle Dutch schutten "to shut, shut up, obstruct"), from PIE *skeud- "to shoot, chase, throw" (see shoot (v.)). Related: Shutting.

Meaning "to close by folding or bringing together" is from mid-14c. Meaning "prevent ingress and egress" is from mid-14c. Sense of "to set (someone) free (from)" (c. 1500) is obsolete except in dialectal phrases such as to get shut of. To shut (one's) mouth "desist from speaking" is recorded from mid-14c.