dig

v.挖，探究 n.捅；发掘的地点或遗迹

differ, difference, different, differential, differential calculus, differentiate, differentiated, differentiation, differently, difficult, difficulty, diffidence, diffident, diffidently, diffract, diffraction, diffuse, diffusely, diffuseness, diffusion, dig down, dig in, dig out, dig up, digest, digestibility, digestible, digestion, digestive, digestive biscuit (also digestive), digestive system, digger, digging, digit, digital, dignified, dignify, dignitary, dignity, digraph,