IPA: /ˈsɛdʒ.ə.ləs/
KK: /ˈsɛdʒələs/
Showing great care and effort in doing something; hardworking and diligent.
She was sedulous in her studies, always striving to improve her grades.
Sedulous is derived from the Latin 'sedulus' (meaning diligent or careful), which comes from 'sedere' (meaning to sit). The word describes someone who is diligent and attentive, as if they are sitting down to focus on their tasks with care.
Think of someone who is 'sitting down' ('sedere') to work diligently and carefully on their tasks — that's why sedulous means diligent.