Synonyms

'Inherent' refers to qualities that are permanently or naturally part of something's essential character. 'Inborn' specifically describes traits or characteristics present from birth, making them inherent to a person or organism.

'Insidious' describes something proceeding in a gradual, subtle way with harmful effects, often involving treacherous or deceitful intent. 'Cunning' means achieving goals through deceit or evasion, which captures the treacherous nature of something insidious.

'Rational' means based on reason or logic, showing sound judgment. 'Intellectual' relates to the intellect or reasoning ability. While not a perfect synonym, in this context, it's the best match as it contrasts with emotional, arbitrary, or absurd thinking.

'Eager' means having or showing keen interest or intense desire. 'Earnest' means resulting from or showing sincere conviction, often with intense zeal. They share the quality of eagerness and sincere enthusiasm.

'Mediate' means to intervene between people in a dispute to bring about agreement or reconciliation. 'Intervene' means to come between parties to settle a dispute, making it the correct synonym in this context.

'Immunity' means exemption from obligation or penalty, or resistance to infection. 'Unsusceptibility' means the quality of not being susceptible or vulnerable to something, which directly captures the protective aspect of immunity.

'Insight' means the capacity to gain accurate and deep understanding. 'Intuition' is the ability to understand something immediately without conscious reasoning - a form of deep, instinctive insight. This is the closest synonym among the options.

'Listless' means showing no enthusiasm or energy, lacking spirit or drive. 'Languid' means displaying or having a disinclination for physical exertion or effort, capturing the same sense of lethargy and lack of energy.

'Itinerant' means traveling from place to place, never settling in one location. 'Wandering' means going from place to place without a fixed destination, which directly corresponds to the itinerant lifestyle.

'Advanced' can mean far ahead in development or progress. 'Precocious' means having developed certain abilities or proclivities at an earlier age than usual - being ahead in development. This matches the 'ahead in development' meaning of advanced.

'Immoral' means not conforming to accepted standards of morality, often implying wrong or evil behavior. 'Evil' means profoundly immoral and malevolent, making it the correct synonym as it directly captures the negative moral aspect.

Punctilious means showing great attention to detail or correctness of behavior. It refers to someone who is very precise and careful about following rules or social conventions. Words like careless, inaccurate, or rough are antonyms that convey the opposite meaning.

Raillery refers to good-humored teasing, playful joking, or witty remarks exchanged in a friendly manner. Banter is the closest synonym, capturing the light and teasing nature. Rudeness, boldness, and brashness are incorrect as they lack the playful/friendly element essential to raillery.

Wicked is a direct synonym for sinful, meaning morally wrong, evil, or violating moral principles. Decent, moral, and pure are all antonyms - they represent goodness and virtue, which is the opposite of what sinful means.

Economise means to spend less, avoid waste, or practice thrift - which matches one key meaning of 'save' in the context of money or resources. Waste is the opposite of saving. Weaken means to make less strong, and reduce means to make smaller - neither captures the financial prudence aspect of saving.