Tendentiously is an adverb used to describe something that is biased or slanted towards a particular viewpoint or agenda. Synonyms for tendentiously include one-sidedly, prejudicially, favorably, and opinionatedly. Another synonym is subjectively, which implies a personal bias or interpretation. Alternately, words like objectively, impartially, and neutrally convey the opposite meaning and indicate a lack of bias or favoritism. Additionally, words like dogmatically and doctrinally suggest a rigid adherence to a set belief system, while terms like partisanship and factionalism imply a loyalty to a specific group or political faction that overrides impartial judgment.