synallagmatic

Example:Unlike the synallagmatic contract, the gift was given unilaterally without any reciprocal agreement between the parties.

Definition:Involving one party and its rights or obligations without involving the other party or without a corresponding obligation.

Example:The contract was one-sided, and the second party felt it was unfair and non-synallagmatic.

Definition:Characterized by a single direction or source; not involving or benefiting both parties.