As‐sid″u‐ous (�), a. [L. assiduus, fr. assid�re to sit near or close; ad + sedēre to sit. See Sit.] 1. Constant in application or attention; devoted; attentive; unremitting.
She grows more assiduous in her attendance.
Addison.
2. Performed with constant diligence or attention; unremitting; persistent; as, assiduous labor.
To weary him with my assiduous cries.
Milton.
Syn. — Diligent; attentive; sedulous; unwearied; unintermitted; persevering; laborious; indefatigable.
As‐sid″u‐ous‐ly, adv. — As‐sid″u‐ous‐ness, n.