Ten·den·tious (pronounced ten-'den-ches) adj. : marked by a tendency in favor of a certain point of view; implicitly or explicitly slanted. source

EtymologyThe word "tendentious" is derived from the Medieval Latin "tendentia" which means "to cause".
Synonyms:

• Biased
• One-Sided
• Partisan (or Partial)
• Prejudiced (or Prejudicial)
• Prepossessed
• Subjective

• Unbiased
• Nonpartisan (or Impartial)
• Objective
• Unprejudiced

Examples:

1. "The paper reported rather tendentiously on the war atrocities."
2. "A tendentious account of recent elections."