plat (n.)youdaoicibaDictYouDict[plat 词源字典]
"piece of ground," 1510s, from plot (q.v.), assimilated to Middle English adjective plat "flat," which is from Old French plat "flat, stretched out" (see plateau (n.)). See OED for full explanation.[plat etymology, plat origin, 英语词源]
plat (v.)youdaoicibaDictYouDict
"to interweave," late 14c., variant of plait (v.). Related: Platted; platting.