draughty
(adjective) (of an enclosed space) cold and uncomfortable because of currents of cool air
brooding
(verb) showing deep unhappiness of thought
scolding
(noun) an angry rebuke or reprimand
combustion
(noun) the process of burning something
investment
(noun) the action or process of investing money for profit or material result
mechanism
(noun) a system of parts working together in a machine; a piece of machinery
