boceto – rough sketch, rough draft
boe-SAY-toe; sustantivo masculino
El boceto lo deja ver los detalles antes de finalizar el diseño.
The sketch lets him see the details before finalizing the design.
A bosquejo is the first attempt at the formation of an idea in the roughest of terms. A boceto is also a rough representation of the idea, but one that is more advanced and nearly ready for the final rendition. A croquis is a sketched map of an area that gives a general idea of the layout.