9 letters · 20 points in Scrabble
noun initial adjustments to improve the functioning or the efficiency and to bring to a more satisfactory state
noun a very thorough search of a person or a place
noun extortion of money (as by blackmail)
originDeverbal from shake down. An improvised bed would originally have been made by shaking down straw.
Etymology from Wiktionary, CC BY-SA 3.0