signpost

n.路标

sign, sign in, sign language, sign on, signal, signal-box, signaller (US signaler), signally, signalman, signatory, signature, signature tune (also theme tune), signet, signet ring, significance, significant, significantly, signification, signify, signor, Sikh, silage, silence, silencer, silent, silent film, silently, silhouette, silica, silicate, silicon, silicon chip, silicone, silicosis, silk, silk-screen printing, silken, silkiness, silkworm, silky,