Here's why:
* Encounter as a verb: When used as a verb, "encounter" can be followed by a direct object without a preposition.
* Example: "We encountered a bear on the trail." (No preposition needed)
* Encounter as a noun: When used as a noun, "encounter" often describes a meeting or an experience. It may be followed by a preposition, but it's not always necessary.
* Example: "They had an encounter with the enemy." (Preposition "with" is used)
* Example: "The encounter was brief but intense." (No preposition needed)
Prepositions are commonly used with "encounter" to specify the nature of the encounter:
* With: to indicate the person or thing encountered
* Between: to indicate an interaction between two parties
* Of: to refer to the experience itself
* In: to describe a place or situation where the encounter occurred
Ultimately, whether a preposition is needed after "encounter" depends on the context and how you want to express the meaning.