Understanding 'Cryptic' in Context

In the quaint town of Brooksville, locals often gather at the old library to share stories and discuss books. Recently, a new novel was introduced, captivating the hearts of its readers. The protagonist, a whimsical character named Felix, embarks on an adventure filled with unexpected twists. As he navigates through challenges, his journey becomes a reflection of resilience and creativity.

During a particularly difficult moment, Felix encounters a cryptic message that leads him down a dark alleyway. He ponders the significance of this enigma, which appears to perplex even the wisest of townsfolk. The author describes this moment as a turning point for Felix, as it urges him to confront his innermost fears and embrace the unknown.

Consider the usage of the word 'cryptic' in the context of this passage. It is most closely defined as: