triad

n 1 group or set of three related people or things 三人或三物的组合. 2 (also Triad) Chinese secret organization involved in criminal activities 三合会.

trenchant, trenchantly, trencher, trencherman, trend, trend-setter, trend-setting, trendily, trendiness, trendy, trepan, trephine, trepidation, trespass, trespasser, tress, trestle, trestle-table, trews, tri-, trial, trial run, triangle, triangular, tribal, tribalism, tribe, tribesman, tribulation, tribunal, tributary, tribute, trice, triceps, trick, trickery, trickily, trickiness, trickle, trickle charger,