Is the word "think" a transitive or intransitive verb?

Yes.

http://www.merriam-webster.com/dictionary/think

To determine whether the word "think" is a transitive or intransitive verb, we need to understand the nature of these verb types.

Transitive verbs require an object to complete their meaning, whereas intransitive verbs do not require an object. Let's analyze the verb "think" using the following steps:

1. Identify the verb: The word "think" is the verb in question.

2. Determine if it needs an object: Consider whether "think" can express a complete thought without an object.

For example:
- "I think." - This sentence feels incomplete because it lacks additional information or a direct object. Therefore, "think" in this context is intransitive.

However, "think" can also be used transitively with a direct object. For instance:
- "I think about the future." - Here, "about the future" expresses the direct object, and the verb "think" is transitive.

Therefore, the verb "think" can be both transitive and intransitive, depending on the context in which it is used.