Dictionary 1. (a.) Careful in doing; diligent; faithful; attentive.2. (n.) The act of taking pains; carefulness and fidelity in performance. Thesaurus assiduity assiduous assiduousness conscientious conscionable diligence diligent elaborate exact fussy heedful industrious industriousness industry meticulous operose pains painstakingness punctilious punctual scrupulous sedulous sedulousness thorough thoroughgoing thoroughgoingness thoroughness |