Using your knowledge of Esperanto, you know that “to write” is “skribi.” So, if you wanted to think of what tool you would use when you wish to write something, you might combine the root “skrib-” with the infix for “tool, “-il-,” and finish it off with an “-o.” The end result would be “skribilo,” a perfectly acceptable, albeit generic, term for a writing implement.

Of course, Esperanto is a rich language, and so it has a few subtly different synonyms for “skribilo,” when you would rather refer to a more precise writing implement. I’ve listed some of them below for your viewing pleasure. Feel free to comment with any terms you find appropriate, or would like to mention!

Pencil or Crayon – krajono (see also “mekanikakrajono” for “mechanical pencil”)
Pen (Quill or Fountain) – skriboplumo, plumo
Ball-point Pen – globkrajono, globskribilo (notice the “glob-” prefix!)
Eraseable Pen – gumebla plumo
Charcoal Pencil – bragxakrajono
Carbon Pencil – karbonakrajono
Grease Pencil – grasakrajono
Stenographer’s Pencil – stenografia krajono