scaffold: temporary structure used to support a work crew and materials

easel: painting implement

construction: process of the building or assembling of a building or infrastructure

workshop: room or building, with tools, used to repair or make goods

pulley: type of simple machine; wheel on an axle or shaft fixed in a frame; used to change of direction of a cable

Amazon rainforest: large rainforest in South America

group of humans: any set of human beings

portable engine: portable steam engine

public works: broad category of infrastructure projects, financed and constructed by the government

road transport: collective term for all forms of transport which takes place on roads, or (ground) surface, except railroads

Porto Velho: the capital of the Brazilian state of Rondônia, in the upper Amazon River basin

Madeira River: river in Bolivia and Brazil

worker: person who works

railway: interconnected network of infrastructure and vehicles used for train rail transport