Antonyms

 Happiness is closest in opposite meaning to jealousy.

Jocund means cheerful, lighthearted, or merry. Depressed is the opposite, describing a state of sadness or low spirits.

Jittery means nervous, anxious, or shaky. Stable is the opposite, implying a state of calmness, firmness, or lack of agitation.

Judicious means having or showing good judgment. Imprudent is the opposite, meaning lacking care or judgment.

Chaotic means in a disordered condition. So opposite is orderly (neat/ tidy in arrangement).

Chaste means moral. So, opposite is immoral.

This is the correct option. 'Actual' is something that is existing in reality and not potential, possible, simulated, or false

This is the correct option. 'Similarity' implies a quality or state of having something in common.

Blithe means showing a casual and cheerful indifference. Joyless is the direct antonym, meaning lacking joy or happiness.

Awry means away from the appropriate, planned, or expected course; amiss. Straight is the antonym, meaning without a bend or curve.

Palpability means tangibility; reality. Its opposite is intangibility.

Palpable means touchable; tangible; corporeal. Its opposite is phantomlike, meaning ghostlike; spectral; unreal.

Absolute means complete, whole, unconditional. Its opposite is qualified which means conditional, limited.

Acerbic means bitter, sour. Its opposite is sweet.

'Narcissism' refers to self-centeredness, whereas 'altruism' refers to caring for others. Hence, altruism is correct.