O obdurate, unfeeling, callous, and obstinate obedient, respectful, dutiful, and submissive object, propose, protest, and decline obliging, kind, helpful, and courteous obscure, shadowy, intricate, and mysterious obsequious, cringing, fawning, and servile [obsequious = fawning.] observations, sentiments, ideas, and theories obstinacy, pertinacity, stubbornness, and inflexibility [pertinacity = persistent] offensive, disagreeable, distasteful, and obnoxious officious, impertinent, insolent, and meddlesome |