Antonyms

Humorous means causing laughter or amusement. Serious means not joking or solemn - the correct opposite. Reliance means dependence, stray means wander, real means genuine.

To ebb means to gradually decrease or flow away from something. Increase means to become greater - the direct opposite. Decline is similar to ebb, intrude means to enter uninvited, content means satisfied.

Despair means complete loss of hope. Elation means great happiness and exhilaration - the direct opposite. Defection means abandoning a position, denote means to indicate, sorrow means sadness (similar to despair).

Lazy means unwilling to work or use energy. Laborious means requiring hard work and effort - the correct opposite. Dreadful means causing fear, jealous means envious, neither is the opposite of lazy.

Voluntary means done by choice or free will. Necessary means required or compulsory - something that must be done rather than chosen. Onerous means burdensome but doesn't convey the choice vs obligation distinction. Pour and usual are unrelated concepts.

Insert means to put something into something else. Eject means to expel or throw out - the direct opposite action. Copy means to duplicate, original is the noun form, and 'none of these' is incorrect since eject is the correct antonym.

Peculiar means strange, unusual, or distinct from what is normal or expected. Usual means customary, ordinary, or regular - the direct opposite. Odd is actually a synonym, plain could work but usual is a more precise antonym, and fast is unrelated.

Obscure means unclear, not easily seen or understood. Plain means clear, evident, or obvious - the direct opposite. Joke and lament are unrelated verbs/actions, and 'none of these' is incorrect.

Aggressive means hostile, assertive, or ready to attack. Servile means submissive or overly obedient - the opposite behavioral stance. Remove, favour, and conceal are unrelated verbs that don't describe behavioral attitudes.

Transient means temporary, lasting only for a short time. Permanent means lasting indefinitely or intended to last forever - the direct opposite. Temporary is a synonym, ban and puzzle are unrelated.

A pessimist is someone who expects bad outcomes or focuses on negatives. A hopeful person is optimistic and expects good things - the direct opposite attitude. Decision and unison are unrelated, and 'none of these' is incorrect.

Tremble means to shake involuntarily from fear, cold, or emotion. Steady means firm, stable, or not shaking - the direct opposite state. Vibrate is a synonym, odd and shy are unrelated.