plat
n.
"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.
v.
"to interweave," late 14c., variant of plait, v.. Related: Platted; platting.
词根：plat = flat, 表示“平坦”
plate n. 盘子（盘子中间是平的）
plateau n. 平顶；高原（plat+eau 表名词→平坦地）
platform n. 月台；讲台（plat+form形状→形状平的地方→平台，月台）
platitude n. 陈词滥调（plat+itude状态→[语言]平坦→陈词滥调）