obelisk

n tall pointed stone pillar with four sides, set up as a monument or landmark 方尖碑（用作纪念碑或地标）.

OAS, oasis, oast, oasthouse, oat, oatcake, oath, oatmeal, oats, OAU, ob, obbligato, obbr.(=Music TV), obduracy, obdurate, OBE, obedience, obedient, obediently, obeisance, obese, obesity, obey, obfuscate, obfuscation, obiter dictum, obituary, object, object glass, object lens, object lesson, object to, object to sth., objection, objectionable, objectionably, objective, objectively, objectivity, objector, objet d'art,