<p><strong>Adjective</strong></p><ul><li>taking or characterized by taking pains or trouble; expending or showing diligent care and effort; careful: a painstaking craftsman; painstaking research.</li></ul><p><strong>Synonyms</strong></p><ul><li>scrupulous, thorough</li></ul><p><strong>Noun</strong></p><ul><li>careful and diligent effort.</li></ul>