A sedulous person is someone who works hard and doesn't give up easily. If you make repeated and sedulous attempts to fix a leaky pipe and it only makes things worse, it might be time to go online and find the number of a plumber.

There are a couple of words that basically mean the same thing as sedulous but are a little more common, namely assiduous, painstaking, and diligent. Like sedulous, all of these adjectives can be turned into adverbs by adding the suffix ly: "He assiduously tried to fix the pipe, but to no avail."

Definitions of sedulous

adj marked by care and persistent effort

sedulous pursuit of legal and moral principles”
characterized by care and perseverance in carrying out tasks