Antonyms

To disclose means to make information known or to reveal. To conceal means to keep something secret or hidden, which is the opposite.

Passive describes someone who accepts what happens without active response or resistance. Lively describes someone full of life and energy, which is the opposite.

Lenient means merciful or tolerant. Strict means demanding that rules be obeyed and not allowing much freedom, which is the opposite.

Being adept is being competent and proficient at something. 

Infallible means exempt from failure or error. Imperfect may be fallible.

 Being incognito is being hidden. The words anonymously and disguised are synonyms of incognito.The correct answer is openly as this is antonym of incognito. Privately is antonym of publicly or openly.

Frequently means happening often. The opposite is rarely, which means happening seldom.

Futile means incapable of producing any useful result; pointless. The opposite is useful.

Lament means to express passionate grief or sorrow. The opposite is to rejoice, which means to feel or show great joy.

Junior refers to someone of lower rank or status. The opposite is senior, which refers to someone of higher rank or status.

Substantial means of considerable importance, size, or worth. The opposite is inadequate, meaning not enough or insufficient.

Fraternity means the state of being brothers or mutual friendship. The opposite is hostility, which means unfriendly or antagonistic behavior.

Haughty means arrogantly superior and disdainful. The opposite is meek, which means quiet, gentle, and easily imposed on.

Economical means using resources carefully or avoiding waste. Extravagant is the direct opposite, meaning lacking restraint in spending money or using resources.

Reverence is a feeling of deep respect or awe. Disrespect is the direct opposite, indicating a lack of such regard.