Antonyms

Cheer means shout of joy, encouragement or praise. It is opposite in meaning to discourage.

Inhalation is the action of breathing in. Exhalation is the action of breathing out. Hence, exhalation and inhalation are antonyms.

Voluntary means done, given or acting of one's own free will. Compulsory means obligatory or meant to be done. Hence, voluntary and compulsory are antonyms. 

Something and everything are antonyms.

Forebearing means patient or relaxed. Hence, forebearing and impatient are antonyms.

Integrity means honesty and moral uprightness, making it the direct opposite of dishonesty. The other options are unrelated concepts.

Discontinual means intermittent or stopping and starting. Incessant means continuing without interruption, making it the antonym.

Lax means relaxed or not strict or severe. Hence, lax and careful are antonyms.

Beneficial is helpful. Something that is not helpful would be harmful.

Complex i.e. not simple is the antonym.

A denizen is an inhabitant or resident of a particular place. The word exotic (meaning foreign or alien) serves as an antonym because it refers to something from outside, contrasting with the sense of belonging inherent in denizen. Citizen and curmudgeon are unrelated terms, while celestial refers to heavenly bodies and horizon is a physical boundary.

-ic (characteristic of/ having the nature of) Other words: Exotic, cynic, laconic, acerbic, lethargic, citric

-ic (characteristic of/ having the nature of) Other words: Exotic, cynic, laconic, acerbic, lethargic, citric

-ence (quality or state) Other words: Intelligence, prudence, significance, adolescence

-ism (act or practice of) Other words: Skepticism, pessimism, criticism, neologism, anachronism, cynicism