invisible

a.看不见的，无形的

inveterate, inveterately, invidious, invidiously, invidiousness, invigilate, invigilation, invigilator, invigorate, invigorating, invigoratingly, invigoration, invincibility, invincible, invincibly, inviolability, inviolable, inviolably, inviolate, invisibility, invisible ink, invisible mending, invisibly, invitation, invite, invite sb. to (sth.,a place), inviting, invitingly, invocation, invoice, invoke, involuntarily, involuntariness, involuntary, involute, involuted, involution, involve, involved, involvement,