A more thorough explanation:

OBSTRICTION

Archaic. Obligation; bond.

Obstriction is an old-fashioned word that means obligation or bond. It refers to a duty or responsibility that someone has to fulfill. It can also refer to a legal agreement or contract that binds someone to a certain course of action.

1. The obstriction of marriage vows is taken very seriously in many cultures.

2. The obstriction of a contract requires both parties to fulfill their obligations.

In the first example, the word obstriction is used to refer to the obligation that comes with marriage vows. In the second example, it is used to refer to the legal bond created by a contract.