A subordinate clause is a clause that cannot stand alone as a sentence and is dependent on an independent clause for its meaning. It is also known as a dependent clause.

A subordinating conjunction is a type of conjunction that joins an independent clause to a dependent clause, showing the relationship between the two clauses. It is used to indicate a cause-and-effect, contrast, or other relationships.

The sunk cost fallacy is a cognitive bias where people continue to invest in a decision or action due to the resources already invested, regardless of the potential losses. Examples of this include continuing to attend a bad movie or sticking with a bad investment.