Ameliorate Meaning: To make something better or improve. Synonyms: Improve, enhance, upgrade. Antonyms: Worsen, deteriorate, degrade. Usage: The new policies aim to ameliorate living conditions in the city. Ostensible Meaning: Appearing to be true but not necessarily so. Synonyms: Apparent, supposed, alleged. Antonyms: Genuine, real, authentic. Usage: The ostensible reason for his visit was to see a friend, but he had other motives. Juxtapose Meaning: To place side by side for comparison. Synonyms: Compare, contrast, appose. Antonyms: Separate, divide, part. Usage: The artist juxtaposed vibrant colors against dull backgrounds. Ubiquitous Meaning: Present or appearing everywhere. Synonyms: Omnipresent, pervasive, universal. Antonyms: Rare, scarce, uncommon. Usage: Smartphones have become ubiquitous in today’s society. Erudite Meaning: Having or showing great knowledge. Synonyms: Learned, scholarly, knowledgeable. Antonyms: Ignorant, uneducated, uninformed. Usage: The professor’s erudite lecture impressed the students. Vacillate Meaning: To waver between different opinions or actions. Synonyms: Hesitate, waver, fluctuate. Antonyms: Decide, settle, resolve. Usage: She vacillated between pursuing a career in law or medicine. Loquacious Meaning: Tending to talk a great deal. Synonyms: Talkative, garrulous, chatty. Antonyms: Reticent, silent, taciturn. Usage: His loquacious nature made him popular at social gatherings. Reticent Meaning: Not revealing one’s thoughts or feelings readily. Synonyms: Reserved, withdrawn, taciturn. Antonyms: Communicative, open, loquacious. Usage: She was reticent about her plans for the future. Sanguine Meaning: Optimistic or positive, especially in a difficult situation. Synonyms: Optimistic, hopeful, confident. Antonyms: Pessimistic, gloomy, doubtful. Usage: He remained sanguine despite the challenges he faced. Austere Meaning: Severe or strict in manner, attitude, or appearance. Synonyms: Stern, harsh, rigorous. Antonyms: Lenient, indulgent, luxurious. Usage: The monk’s austere lifestyle included minimal possessions and simple meals.