Explanation:
a place where a person's foot can be lodged to support them securely, especially while climbing
By comparing him to a fictional character with similar characteristics.
Context.
Dictionary definition: <span>the parts of something written or spoken that immediately precede and follow a word or passage and clarify its meaning.
and
</span>the circumstances that form the setting for an event, statement, or idea, and in terms of which it can be fully understood and assessed