surround

vt.包围，环绕 n.环绕物

surname, surnamed, surpass, surpassing, surpassingly, surplice, surplus, surprise, surprised, surprising, surprisingly, surreal, surrealism, surrealist, surrealistic, surrender, surreptitious, surreptitiously, surrey, surrogate, surrounding, surroundings, surtax, surveillance, survey, surveyor, survival, survive, surviving, survivor, sus (also suss), susceptibility, susceptible, suspect, suspect sb. of, suspend, suspended, suspended animation, suspender, suspender belt,