The term penible is an adjective meaning painstaking. It is often used as another word for the term assiduous. It may also be used to mean onerous; that is burdensome.
As an adjective painstaking means requiring or marked by great pains. In other words it means extremely careful and diligent. When used as a noun it means tremendously diligent and careful work or effort. Synonyms for the term painstaking include the words conscientious and scrupulous.
The adjective assiduous on the other hand is used to mean constant or unvarying in application or attention. It is used as another word for the term diligent. It could also be used to mean unceasing or persistent. A synonym for the word assiduous is the term sedulous.
As an adjective painstaking means requiring or marked by great pains. In other words it means extremely careful and diligent. When used as a noun it means tremendously diligent and careful work or effort. Synonyms for the term painstaking include the words conscientious and scrupulous.
The adjective assiduous on the other hand is used to mean constant or unvarying in application or attention. It is used as another word for the term diligent. It could also be used to mean unceasing or persistent. A synonym for the word assiduous is the term sedulous.