'Arduous' means involving a lot of effort and difficulty, which is closest to 'difficult'.

'Benevolent' means well-meaning and kindly, which is closest to 'kind'.

'Ambiguous' means open to more than one interpretation; not having one obvious meaning.

'Candid' refers to being truthful and straightforward; frank.

'Superfluous' means unnecessary, especially through being more than enough.

'Dim' is the antonym of 'bright', referring to a lack of light or brightness.

'Deceitful' is the opposite of 'Candid', which means truthful and straightforward.

'Diligent' means showing care in one's work or duties, while 'lazy' means unwilling to work or use energy.

'Selfish' is the antonym of 'generous', referring to someone who is not willing to share or give.

'Sincere' means free from pretense or deceit, while 'insincere' means not expressing genuine feelings.

'Weak' is the antonym of 'strong', indicating a lack of strength or power.

'Important' is the opposite of 'Trivial', which means of little value or importance.

'Pragmatic' means dealing with things sensibly and realistically in a way that is based on practical rather than theoretical considerations.

'Ubiquitous' means present, appearing, or found everywhere.

A philatelist is someone who collects and studies postage stamps.

An architect is a professional who designs buildings and other structures.

An entomologist is a scientist who studies insects.

A chef is a professional cook, skilled in the culinary arts.

An archaeologist studies human history and prehistory through excavation and analysis of artifacts.

A sociologist studies the development, structure, and functioning of human society.

A psychologist is a professional who studies mental processes and human behavior.

An entomologist is a scientist who studies insects.

A psychologist is a professional who studies mental processes and behavior.

An astronomer is a scientist who studies celestial bodies such as stars and planets.

A geologist is a scientist who studies the solid Earth and its processes.

An explorer is someone who travels to discover new places.

A composer is someone who creates and writes music.

A dramatist is a playwright, someone who writes plays.

'Transparent' means allowing light to pass through, while 'opaque' means not able to be seen through.

'Kind' is synonymous with 'Benevolent', which means well-meaning and kindly.