Pendragonish

Example:His actions were despicable and unworthy of a true leader.

Definition:An expression that indicates something or someone that is morally bad, of low quality, or extremely disappointing.

Example:The army was weakened and lacked the strong leadership necessary to turn the tide of battle.

Definition:Of or denoting the one of two alternative forms of an atom or molecule that is less electronegative or less positive in a chemical compound, or the weaker of two isomers.

Example:He acted in a childish manner, making it difficult for others to take him seriously.

Definition:Typical of a child; lacking maturity, judgment, or skill.