1. (

• indefensible ,
• insupportable ,
• unjustifiable ,
• unwarrantable ,
• unwarranted

) incapable of being justified or explained ;

2. (

• baseless ,
• groundless ,
• idle ,
• unfounded ,
• unwarranted ,
• wild

) without a basis in reason or fact; "baseless gossip"; "the allegations proved groundless"; "idle fears"; "unfounded suspicions"; "unwarranted jealousy" ;

3. (

• undue ,
• unjustified ,
• unwarranted

) lacking justification or authorization; "desire for undue private profit"; "unwarranted limitations of personal freedom" ;