assiduous

[ uh-sij-oo-uhs ]
/ əˈsɪdʒ u əs /

adjective

constant; unremitting: assiduous reading.
constant in application or effort; working diligently at a task; persevering; industrious; attentive: an assiduous student.

Origin of assiduous

1530–40; < Latin assiduus, equivalent to assid(ēre) to sit near, beside, dwell close to (see assess) + -uus deverbal adj. suffix; see -ous

OTHER WORDS FROM assiduous

Example sentences from the Web for assiduousness

British Dictionary definitions for assiduousness

assiduous
/ (əˈsɪdjʊəs) /

adjective

hard-working; persevering an assiduous researcher
undertaken with perseverance and care assiduous editing

Derived forms of assiduous

assiduously, adverb assiduousness, noun

Word Origin for assiduous

C16: from Latin assiduus sitting down to (something), from assidēre to sit beside, from sedēre to sit