Care!

assiduous
(adj)
ǝ-SID-yoo-ǝs
Meaning

diligent; determined; highly focused; thorough

1st Sample Sentence

It initially looked like the incident would blow up into a major dispute between the two countries, but thanks to the assiduous efforts of diplomats on both sides, the crisis was averted and normal relations were restored.

Root

ad (to)#sedere (to sit) (Latin)

Mnemonics

If you get "assi" i.e. 80%, you sure are hardworking and assiduous