articulated

1. To make clear or effective.
2. To speak clearly; to enunciate.

   I wish he’d articulate his words more clearly.

3. To explain; to put into words; to make something specific.

   I like this painting, but I can’t articulate why.

4. To bend or hinge something at intervals, or to allow or build something so that it can bend.

   an articulated bus

5. To attack a note, as by tonguing, slurring, bowing, etc.

   Articulate that passage heavily.

6. To form a joint or connect by joints

   The lower jaw articulates with the skull at the temporomandibular joint.

7. To treat or make terms.

noun

An articulated vehicle, such as a locomotive.

1. Constructed with one or more pivoted joints which allow bending of an otherwise rigid structure.
2. Of a vehicle, composed of component parts each with its own wheels and chassis, e.g. an articulated lorry, articulated bus, or certain kinds of streetcars and trains.